start.me - A Modern-day bookmark manager. A place for your favorites. A news feed (RSS) reader. A browser startpage. A portal for your team.
Addoncrop - Extends the functionality of your web browser
Protopage - The best iGoogle alternative. Chris Pirillo calls Protopage "The best designed".
Chrome Extension Downloader - Chrome Extension Downloader is the name of a website dedicated for downloading and Chrome extensions.
Netvibes - First personalized dashboard publishing platform for the Web. Digital life managment, Widget distribution services and brand observation rooms.
Opera Add-ons - Get extensions and themes for the http://alternativeto.net/software/opera browser.