TACO is a toolkit for building distributed control systems or any other distributed system. It is based on a C/C++ core. It is based on the client-server model. It supports writing clients and server on Unix+Windows. Clients and servers can be written in
XDAQ is a software platform designed specifically for the development of distributed data acquisition systems. The development is carried out at CERN, the European Organization for Nuclear Research. Please visit http://xdaq.web.cern.ch
GroupKit is a Tcl/Tk library that makes it easy to prototype and build real-time collaborative applications (groupware), such as multi-user drawing tools, text editors, meeting tools, and much more.
ghack ("grid hack") is meant to allow small groups of people to voluntarily share their computer resources to work on collective problems. Goals are: easy to use (e.g. scientific coders), easy to deploy (e.g. no elevated priviliges or open firewall ports
Framework for software component integration, interoperability and adoptability through a XML based vocabulary: Software Component Integration Mark-up Language (SCIML)