llvmruby.org
llvmruby is a Ruby extension that makes using the LLVM compiler building tools easy and fun.
Tungsten Replicator
The Tungsten Replicator implements open source database-neutral master/slave replication
Disco
The Disco core is written in Erlang, a functional language that is designed for building robust fault-tolerant distributed applications. Users of Disco typically write jobs in Python,
Prophet DB
Prophet is a distributed P2P database, with semi-automatic conflict resolution. From the father of RT.
zeromq: Fastest. Messaging. Ever.
”* Our mission with ØMQ (“ZeroMQ”) is to build the fastest messaging ever. The way to get performance is to optimise the whole software and hardware stack together. So, we are developing ØMQ closely with major hardware firms.
* ØMQ is already very fast. We’re getting 25μsec end-to-end latencies and 2.6 million messages per second today.”