Jetty as embedded web server

Especially useful for unit tests, agile development, quick start of applications during development

Thread-safe database connection

...with ThreadLocal

Java Memory Model

Interesting information about the key word synchronized...

RIFE Web Framework

Good framework for mid-sized applications that can be handled without the over-complex Spring framework.

SCIGen 

With just one click you can create your own academic publications (but don't make them public then...)

About Albert Einstein

Albert Einstein Performance Review or Dress for Success

WinKey 

Create shortcut keys for your daily used actions, such as folders to open, commands to execute. Very handy and easy to use