Pétrolette is a news home page, immediately usable without registration with the same URL on any computer, TV or mobile device.
Add, delete, move feeds and tabs, close your browser, come back tomorrow, everything is how you left it.
POSH (Portaneo Open Source Homepage) is a personalizable interface (Netvibes, iGoogle) that can be used in a web application or educational / enterprise intranet context. Enterprise version adds social network, notebooks and search feature.