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.
Padlet - Visual boards for organizing anything.
Netvibes - First personalized dashboard publishing platform for the Web. Digital life managment, Widget distribution services and brand observation rooms.
BookWidgets - BookWidgets is an excellent application that let you create engaging exercises in minutes and easily share a varied variety of beautiful and fun activities with your classroom and others.
Protopage - The best iGoogle alternative. Chris Pirillo calls Protopage "The best designed".
Quizlet - Quizlet allows you to review and create flashcards for a variety of subjects, such as math and reading.