One Edutech Wiki has a list of useful web 2.0 applications. A few of them are listed in the box below. Do you know them? There are many others, too.
Flikr Tegrity Facebook YouTube Blogs Wikis Elluminate
Meebo Google Twitter Second Life Jott Picasa LinkedIn
Podcasting Digg eFolios Lively Del.icio.us RSS Feeds
Another Edutech Wiki is entitled E-learning 2.0. This is a useful site to give you ideas about how to utilize the many web 2.0 applications for enhancing student engagement, retention and learning.
And a third Edutech Wiki is on Personal learning environments, where web 2.0 tools and applications are collected by the learner to use as needed. A fun site is Emily Chang's eHub that constantly updates a list of web 2.0 application sites.