Ok, so this is the UPDATED top of most popular chrome extensions for Google+ that I found until now in the chrome web store. Did I miss an extension or make a mistake? Leave me a comment on the original post: http://goo.gl/OLveP. Please share this to help the g+ community.
1. Hover Zoom (215,030 users) – http://goo.gl/yrHOA
Enlarge thumbnails on mouse over. Works on many sites (Facebook, Twitter, Google, Flickr, Reddit, Amazon, etc).
2. Google +1 Button (166,957 users) – http://goo.gl/LKO1Y
+1 and share a web page, anywhere you go on the web.
3. Google+ Notifications (95,554 users) – http://goo.gl/UQhIh
View notifications of Google+ activity when signed in, anywhere you go on the web.
4. Extended Share (75,854 users) – http://goo.gl/mijZv
Extends Google+ to share to Facebook, LinkedIn, Twitter, and many more.
5. SGPlus (64,781 users) – http://goo.gl/McxeX
Complete social network integration: post to Facebook and Twitter, see your feeds inside Google Plus, and much more
6. +Photo Zoom (63,099 users) – http://goo.gl/rHIEP
Easily zoom photos and profile pics from your Google Plus Stream.
7. Google Translate for G+ (61,938 users) – http://goo.gl/PjSrQ
Translate your Google+ stream using integrated, inline, Google Translate support.
8. Publish sync for google+ & facebook (56,821 users) – http://goo.gl/F3am4
Provides two-way syncs Google+, Facebook, Twitter, Plurk. It supports article, video, pictures and more
9. Replies and more for G+ (39,455 users) – http://goo.gl/Zv8WJ
Adds reply and reply-to-author buttons to Google+ comments and a number of other enhancements.
10. G+me (35,289 users) – http://goo.gl/JgR2Z
Collapses the Google+ stream while keeping live updates: collapses posts, hides comments, etc.
11. Surplus (32,103 users) – http://goo.gl/vRlPE
Google Plus Integration for Chrome
12. Usability Boost for G+ (24,320 users) – http://goo.gl/CLnUG
Greatly improves readability on Google Plus, ability to star posts to read later and some other useful features
13. 1-Up for Google+ (18,368 users) – http://goo.gl/O0NkA
Changes your +1 icon on Google+ into a 1-up mushroom from Mario Brothers. Complete with sound!
14. Google Plus Directory (15,601 users) – http://goo.gl/iAdXC
Find your G+ is a Google Plus person directory, where you can meet new people, start making new friend circles and more for Google+
15. Google+ Ultimate (15,422 users) – http://goo.gl/Q6xd3
This extension for Google Plus adds functionatility and themeing for the site.
16. -1 Minus One for G+ (12,306 users) – http://goo.gl/WYuf6
Minus one (-1) button in Google+ (Post & Comment), Notifications.
17. Plus Minus (12,087 users) – http://goo.gl/PM0Mr
Lets you select which Circles show up in your Google+ Stream, allows you to easily mark individual or all posts as read, offers a wide-screen view so you can see more content without scrolling, and loads more posts automatically as you scroll down.
18. More for Google Plus (9,837 users) – http://goo.gl/JzwVL
Loads more content as you reach the bottom of the Google+ page.
19. Google Plus News, Blogs, Tips & Updates (7,956 users) – http://goo.gl/exYbm Google-Plus.com is a third party site created to cover latest news, blogs, tips & tricks, howto’s, updates and progress of the upcoming Google+ social network.
20. RSS Share for Google Plus (7,575 users) – http://goo.gl/IiwUo
Google+ and Google Reader Integration. ‘Share on Google+’ button on Google Reader. Google Reader in Google Plus.
21. Google+ Tweaks (7,398 users) – http://goo.gl/x00Pw
Tweaks to the layout and features of Google+ (Google „Plus”) Full width, thumbnails only, etc.
22. DownloadSupport for Google+ (7,208 users) – http://goo.gl/GCzVY
Download pictures and videos on the stream of Google +.
23. Uncircle Inactives+ (6,627 users) – http://goo.gl/VqDLu
Google+: Find and Remove Inactive People in Selected/All Circles. Inactivity = No Public/Private Posts At All or Since a Chosen Date
24. Helper for Google+ (6,570 users) – http://goo.gl/lNbSX
Add extra functions the Google+. Get desktop notifications on new posts. Share Posts via twitter. Translate posts with Google Translate. Bookmark posts faster for reading later (also to delicious.com). Linked #hashtags. Search in posts and profiles directly from your omnibox.
25. Notification Count for G+ (6,179 users) – http://goo.gl/Zml0f
Extension for displaying unread notification count for Google Plus
26. +1 Button (5,560 users) – http://goo.gl/h67bs
Plus one every page you like with only one click, directly from omnibox, without any annoying popup
27. Facebook for Google+ (5,428 users) – http://goo.gl/trBf9
Add your Facebook Stream to your Google+™ Profile
29. G+ Count in Title (4,961 users) – http://goo.gl/dANji
Adds notification count to the document title in the page tab.
30. Layouts for Google Plus (4,560 users) – http://goo.gl/tBPMO
Change your Google Plus background to any image you want. Click the ‘Edit Background’ button in the lower right corner to change…
31. G+ Tweet (4,378 users) – http://goo.gl/118rn
A full featured twitter client for Google+. View your timeline, url shortening, photo sharing and more…
32. Auto-Colorizer for G+ (4,105 users) – http://goo.gl/kRbLi
Colorizes Google+ and Facebook based on the user’s photo.
33. Slinky G+ (3,539 users) – http://goo.gl/upGRt
Smart ,Simple and Beautiful Google +
34. Circle+ (3,487 users) – http://goo.gl/Ebkm0
Add people to your circles on Google+ from any webpage.
35. G+ Manager (3,445 users) – http://goo.gl/FfWzC
Manage your Google plus. Keyboard shortcuts, notify icon, collapse, translate posts and more…
36. GTools+ (3,286 users) – http://goo.gl/480VE
Adds many useful features for Google+ services. You can : stick the google bar, translate posts, customize notification…
37. Beautify G+ (3,280 users) – http://goo.gl/T03hB
Makes Google+ a little bit nicer to look at.
38. G+ Extended (2,961 users) – http://goo.gl/UrCUO
Additional shortcuts for G+. Including +1 (+), share (s) and expand comments (e).
39. Plus One (+1) Button (2,943 users) – http://goo.gl/M9geW
Google +1 button for all websites. Especially those who doesn’t have one installed.
40. Plus One Anything (2,719 users) – http://goo.gl/ItXav
With this extension you are given the ability to +1 almost any webpage.
41. G+ Stream Pause (2,691 users) – http://goo.gl/tKSFC Allow’s you to pause your Google+ stream so you can take your time reading or watching videos posted
42. Share+ Social Buttons (2,687 users) – http://goo.gl/UmLc0
Share+ will add a context-link icon below your Google+ post in order to share your post to some well-known social platforms.
43. Google +1 (2,483 users) – http://goo.gl/PaKyZ
Share the current site with google +1
44. Midnight Theme for Google+ (2,461 users) – http://goo.gl/AwdU5
Tired of all that white? The Midnight Theme extension applies a clean, dark theme to Google+. Even your girlfriend will like it.
45. Reader to Plus (2,292 users) – http://goo.gl/HEFMl
Provides an way to share your Google Reader’s items to Google Plus easily.
47. Stream Filter BETA (1,971 users) – http://goo.gl/Ync8g
Gives you the option to filter your stream and track it.
48. G+ Game Companion (1,801 users) – http://goo.gl/KcLbD
G+ Game Companion (formerly G+ Notify Circles) is a Google Chrome extension designed to help you with Google Plus games
49. My Hangouts for Google Plus (1,562 users) – http://goo.gl/hnoZ2
Quick view of all the active hangouts in your stream.
50. Uncircle Uncirclers+ (1,556 users) – http://goo.gl/j2Lu8
Find & Remove People in your Circles who’ve not Added you Back to their Circles. Unfollow Unfollowers, Uncircle Uncirclers.
51. Color Plus (1,543 users) – http://goo.gl/5qWcw
A simple extension that replaces any Google Plus bar with a more colorful alternative.
52. Google Plus Button (1,541 users) – http://goo.gl/yb638
The extension installs a small icon in your navigation bar to access google plus fast and easy with a single click. The icon opens your google plus page in a new or current tab.
53. Quick Hangouts (1,499 users) – http://goo.gl/ikRt5
Adds a link underneath the ‘Start a Hangout’ button to join any active hangouts
54. View original size image (1,443 users) – http://goo.gl/AyImB
View original size image for Picasa. Please use with Google+
55. Gooce+ | Facebook, Linkedin, Twitter (1,385 users) – http://goo.gl/O1Qvj
Complete social network integration: read and post to Facebook, Twitter and Linkedin, search for people and posts inside Google Plus.
56. Search Extension for Google Plus (1,372 users) – http://goo.gl/LrgWF
Search Google Plus (Google+) public contents and profiles online.
57. Golden View for Google+ (1,368 users) – http://goo.gl/scoaD
Google Plus enhancements: (optional) modules: User Mute, Default Circle, Hide Images, Hide comments, & Search w/ Google.
58. Circle Management BETA (1,321 users) – http://goo.gl/koODm
Have better control managing your circles. Do you have more circles than you can manage? Circle management in Google+ has yet to change. So, I am going to make your circle management easier.
Currently, this extension will add a search box on top of your circle list (the one that pops up when adding a user to your circles), and allows you to quickly locate a specific circle.
59. G+Twitter (1,286 users) – http://goo.gl/Acpuq
Realtime Twitter client for Google+
60. Extended Embed BETA (1,284 users) – http://goo.gl/dhYLX
Automatically embed a rich content in Google+ such as flickr, soundcloud, hulu, slideshare, smugmug, and revision3.
61. Share on Google Plus (1,283 users) – http://goo.gl/h7cPY
Share any webpage on Google Plus by a single click. You DON’T need to publicly +1 the page to Share it on Google Plus.
(though it says ‘You publicly +1’d this as xxxx’, it is not the case. )
62. Hangout Pad for Google+ ALPHA (1,240 users) – http://goo.gl/AyFFq
Working prototype for collaborative coding on Google plus Hangouts. This is ALPHA
63. Google Plus Mania (1,175 users) – http://goo.gl/vELuP
Google Plus Mania is a Web App which feed you with all the latest Google Plus Updates and everything with Google Plus.
64. G++ (1,175 users) – http://goo.gl/QYfUy
Make Google+ Awesome by Adding Facebook and Twitter Feeds
65. LiveOn+ (1,055 users) – http://goo.gl/tx2ld
Announces live-stream events happening on Google+ via the LiveOnPlus.com events feed.
66. Fav+ (1,036 users) – http://goo.gl/mHC0G
Easily bookmark your favorite G+ posts.
67. Circlestar for Google+ (1,019 users) – http://goo.gl/zJDXB
Star posts in Google+ for later reference, just like you star emails in Gmail. Does not sync across computers.
68. Gif Stopper (1,014 users) – http://goo.gl/iCNkH
Stop animated gif images with the escape key. Works with Google+
69. +OneFB: Plus One Button for Facebook (983 users) – http://goo.gl/X3eH3
Adds +1 button below each FB post. All articles recommended by +1 button will be appeared on Google Plus profile.
71. Google+ Refined (906 users) – http://goo.gl/H7UBX
A selection of CSS changes and features for a more refined Google Plus experience.
72. Google+ Hangout Check (812 users) – http://goo.gl/8pSM6
This extension will check for available hangouts in Google
73. Hangout Auto Try Again for G+ (801 users) – http://goo.gl/sQkAx
Tired of clicking the try again button for Hangouts? Then install this.
74. G-Minus (783 users) – http://goo.gl/m37R4
Alerts you when you’ve been removed from a user’s Google+ Circles
75. Styling for Google Plus (721 users) – http://goo.gl/ktLe6
Uses CSS to customize Google+
76. Skins & Share for Google+ & Facebook (716 users) – http://goo.gl/ExHzs
Change the front page’s color of Google + and Facebook. Share content to several websites…
77. Share Widget (663 users) – http://goo.gl/p4YAX
Share your thoughts on Google+. Adds a button that opens a popup where you can make a Google+ post.
78. Hide Google+ Notification (631 users) – http://goo.gl/tGjd6
Simple extension to hide the little red Google Plus notification from the global google header toolbar.
79. Share Widget for Google Plus (614 users) – http://goo.gl/cGjOI
Share your thoughts on Google+
81. PinIt for Google Plus (443 users) – http://goo.gl/QCH1E
Put a pin in your favourite post and add it to the sidebar in Google+
82. Everything Went Black (397 users) – http://goo.gl/WBtPW
This extension modifies page functionality and certain design elements on your Google+ account.
83. Hangouts Finder (385 users) – http://goo.gl/eq68H
Easily find and share public google plus hangouts.
84. Enlightenment for Google Plus (346 users) – http://goo.gl/R2vk3
Enlightenment for Google plus adds a search bar for Google Plus. You can use it to search on Google, Twitter, and the G+ social network.
85. Tweetify for Google Plus (313 users) – http://goo.gl/mgmnZ
Make your Google+ streams Twitter-like. Heavily experimental. Compresses posts in your stream to 140 visible characters. Pages of individual posts or profiles are not affected. An experiment in reducing information overload in Google Plus in a very familiar way.
86. AutoSave for Google+ (288 users) – http://goo.gl/zdq7g
Automatically save the text, restore it.
87. Favorite G+ Stream (280 users) – http://goo.gl/Mtaaa
Allow any G+ user to set a Favorite Stream as default.
88. Trendisimo (257 users) – http://goo.gl/vdi4p
Trending topics for Google+
89. KloutPlus (248 users) – http://goo.gl/Dg9sk
View your friends’ Klout scores on their Google+ profiles. Monitor your own as well.
90. G+ Images Hover Zoom (231 users) – http://goo.gl/Gewco
This extension will enlarge the images shown in Google+ stream when mouser cursor is pointing the image.
91. PlusNotifier (217 users) – http://goo.gl/IKhQ2
Displays unread notifications count in Google Plus
92. Mute Plus (214 users) – http://goo.gl/PH6MT Semi-block people from your main stream using this Chrome extension.
93. Google +1[Plus One] & LIKE in 1 (211 users) – http://goo.gl/dzPrq
Recommend any webpage via +1 or LIKE in just 2 clicks using I rec [I recommend]. Simple, Fast and Light weight.
95. GCview for Chrome (165 users) – http://goo.gl/GYhvu
This changes the style of Google +
96. G+? Why not A+? (150 users) – http://goo.gl/cLSYW
Favourite G+ extensions combined into one
97. Search+ for Google Chrome (149 users) – http://goo.gl/GJFOn
Instantly search Google+ from Google Chrome’s URL bar
98. Google+ Troll Remover (148 users) – http://goo.gl/3nd1s
Will help you to avoid trolls on Google+.
99. Star Bookmarks for Google+ (147 users) – http://goo.gl/SxCfL
Add the Star functionality to Google+ using Google Bookmarks
100. PlusCloutX for Google Plus (142 users) – http://goo.gl/LZNW1
View your friends’ PlusClout.com scores on their Google+ profiles. Monitor your own as well.
101. Stay cool (109 users) – http://goo.gl/C6rhW
Remove the Google Plus What’s hot feature. You can open it by clicking the snow flake.
102. Goodbye for G+ Games (55 users) – http://goo.gl/UxSMW
A simple script by Jonathan Android to hide the Games button for Google+.
103. Productivity++ (53 users) – http://goo.gl/rtQkg
Allows users to hide and show Google+ notifications with one click. It also allows toggling two G+ chat modes.
104. Nonplus (52 users) – http://goo.gl/DhlRC
Automute Google Plus stream entries by hashtag.
105. G+ Stats (17 users) – http://goo.gl/maVcd
Easy way to show G+ users most popular posts and photos
1. Google+ for Android – http://goo.gl/fpxOY
Google+ for mobile makes sharing the right things with the right people a lot simpler.
2. Google+ for iPhone – http://goo.gl/x2q4x Real-life sharing rethought for the web, wherever you are. Google+ for mobile makes sharing the right things with the right people a lot simpler.
3. Google+ search for Android – http://goo.gl/7yVuz
Search Google Plus public contents and profiles online, show the hot trends from Google Plus.
4. Google Plus Photo Importer for iPhone – http://goo.gl/sLHSs
Google Plus Photo Importer is a new iPhone app that allows you to import photos from Facebook, Instagram, Flickr, and Photobucket directly into your Google+ profile.