iPhone: There are thousands and thousands of iPhone applications, but you hardly have time to keep up with their pricing changes, let alone new releases. The FreeAppAlert web service will keep you updated.
You can set up FreeAppAlert’s site to notify you via email, twitter, or RSS about the newest free iPhone apps, including those making the jump from behind a pay wall. If you don’t want to be bothered with notifications, you can browse the site by date when you’re in the mood to stock up on new apps.
If you find a gem in the archives, make sure to throw a link in the comments to share the wealth.