Extensions switcher - Menu for quick extensions control
Addoncrop - Extends the functionality of your web browser
Extensity - Quickly enable/disable Google Chrome extensions.
Chrome Extension Downloader - Chrome Extension Downloader is the name of a website dedicated for downloading and Chrome extensions.
Tab Auto Refresh - Automatically refresh tabs based on custom time intervals
Opera Add-ons - Get extensions and themes for the http://alternativeto.net/software/opera browser.