yourminis.com is a personalized dashboard of minis (mini applications, also known as widgets) that let you perform specific tasks, and get information and features from all over the web in one place.
yGuard is a free Java bytecode obfuscator and shrinker that improves your software deployment by prohibiting unwanted access to your source code and drastically shrinking the processed Jar files at the same time.
This service lets you validate XML documents such as XHTML against the appropriate schemas. It performs a more accurate validation than the W3C validator.