J4L

RFax
Java package/API to send and receive faxes. It can be used to send faxes from your java applications to any group 3 facsimile machine. It requires a class 1 faxmodem.

RMail
Java Mail library. This is a small java package that can send and receive emails. Including MIME and attachements.

RTree
Navigation applet that can create several types of menus, trees, vertical, horizontal. Includes Designer tool for easy and fast development and testing. No much HTML knowledge required. It supports Java script integration. The source code is...