There are a lot of great extensions created for Google Chrome browser by its developers. Some of the favorite extensions are as given below. You can find all of these extensions at chrome.google.com/extensions.
Cloud: Summarizes comments on YouTube videos and Flickr photos to
provide an overview of the crowd’s overall opinion.
Voice: All sorts of helpful Voice features directly from the
browser. See how many messages you have, initiate calls and texts, or
call numbers on a site by clicking on them.
Automatically loads the next page of a site. You can just scroll down
instead of having to click to the next page.
Off the Lights: Fades the page to improve the video-watching
Dictionary: Double-click any word to see its definition, or click
on the icon in the address bar to look up any word.
the Deadline: Checks spelling, style, and grammar on your emails,
blog, tweets, etc.
Hand: Does a quick price check and lets you know if the product you
are looking at is available at a lower price elsewhere.
Checks that your plug-ins (e.g. Java, Flash) are up to date.
Image search utility to find exact matches (including cropped, edited,
or re-sized images).
Turns photo sites such as Flickr, Picasa, Facebook, and Google Images
Docs/PDF Viewer: Automatically previews pdfs, powerpoint
presentations, and other documents in Google Docs Viewer.
Reformat the page into a single column of text.
Bird: A nice Twitter viewing extension.
Cool way of viewing your feeds via Google Reader.
Full-featured blog editor that lets you easily post to any of your
Anywhere: Digital post-it notes that can be pasted and saved on any
Messaging Notifier: IM on multiple clients.
the Milk: The popular to-do app.
Turns the web into a music library.