Protopage - The best iGoogle alternative. Chris Pirillo calls Protopage "The best designed".
Start.io - Make awesome homepages that are simple and wonderful.
Netvibes - First personalized dashboard publishing platform for the Web. Digital life managment, Widget distribution services and brand observation rooms.
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.
Symbaloo - Symbaloo is a personal start page, your personal desktop for the Internet.
iGoogle Portal - First of all, it merits mentioning here that this personalized platform by no means equal to iGoogle.