As announced recently, Google has made official the Chrome Extensions Gallery, adding the most awaited feature by users to its browser.

Although the extensions list is yet not as long as the one in Firefox, there are some really nice that you should consider among the near 400 extensions available today. This are the 10 must-have Google Chrome Extensions:

1. RSS Subscription Extension

   
   This extension auto-detects RSS feeds on the page you are reading and upon finding one will display an RSS icon in the Omnibox, allowing you to click on it to preview the feed content and subscribe.

   The extension comes with 4 feed readers predefined (Google Reader, iGoogle, Bloglines and My Yahoo) but also allows you to add any web based feed reader of your choice to the list.

2. Chromed Bird

   
   Chromed Bird is a Twitter extension that allows you to follow your timelines and interact with your Twitter account. Features include the ability to follow your friends timeline and navigate through older tweets, tweets caching to avoid hitting Twitter’s API rate limit, compose, reply, and RT tweets, create short URLs, track read/unread tweets and new tweets notifications.

3. Aviary Screen Capture

   
   This quick screen capture addon is a must-have for bloggers and designers alike! It will perform a screen capture of the visible portion of any webpage and then open the capture INSTANTLY in a basic image editor where you can do markup (draw arrows and rectangles), edit (crop, rotate and resize) and get the exact pixel colors of the image. A perfect companion tool for designers and bloggers!

4. Picnik Extension for Chrome

   
   The Picnik Extension for Chrome lets you easily edit the images you come across while browsing the web. With a click you can create a snapshot of your current web page and open it in Picnik for easy editing, annotation and sharing. Do the same for all the image on the current page — just pick the image from the dynamic hot list and then edit, annotate and share with Picnik.

5. Resolution Test

   
   Resolution Test changes the size of the browser window for developers to preview their websites in different screen resolutions. It includes a list of commonly used resolutions as well as a custom option for you to input your own.

6. Google Mail Checker

   
   Displays the number of unread messages in your Google Mail inbox. You can also click the button to open your inbox. It also comes with a swell animation when the number of items in your inbox changes.

7. Chrome.fm

   
   With Chrome.fm you can listen to your favorite Last.fm stations right in your Chrome Browser. It adds a nice little Icon to the Browser Window where you can *play*, *stop*, *love*, *hate* songs, just like you can at Last.fm.

8. Nimbb

   
   This extension allows you to record short videos using your webcam and to share them with your friends. To get started, simply click on the Webcam button to display the recorder. Then record a video. Don’t forget to click Save once you have recorded your video. Finally, use the provided URL to share the video.

9. Google Translate

   
   This extension adds a button to your browser toolbar. Click the translate icon whenever you want to translate the page you’re visiting.

   The extension also automatically detects if the language of a page you’re on is different from the language you’re using for your Google Chrome interface. If it is, a banner appears at the top of the page. Click the Translate button in the banner to have all the text on the page appear in the new language.

10. Docs PDF/PowerPoint Viewer (by Google)

    
    Automatically previews pdfs, powerpoint presentations, and other documents in Google Docs Viewer.