sandeshvahak is a desktop whatsapp client which uses whatsapp service to connect with other whatsapp.
It is entirely written in corejava.
since it is under development so some may not work.
The most exciting feature of sandeshvahk is click-to-call with no cost which is not in whatsapp is under development.
The main goal of POPEYE is to provide the concepts, methods and core services for next generation mobile collaborative working environment with emphasis on P2P information exchange model in the environment of heterogeneous mobile ad hoc networks.
Freedom from MS mail! A Java-based POP3 server front-end to Outlook Web Access (OWA). Use any standard mail client. Virtually no configuration and a single server can be shared by multiple users! Many core packages are easily reusable.