Yahoo! had a lot of Open platform releases OpenSocial, YAP, etc and opens up the BrowserPlus platform for anyone to use with the release of Yahoo! BrowserPlus version 2.1.6.

Features include:

• Google Chrome and IE 6 support
• Smaller 2mb installation
• End user configuration panel for managing permissions on a per site basis
• three new services
• a fun game using the macbook's motion sensor!
• full API documentation, code samples, and a new forum for developers

More info: Yahoo! BrowserPlus