Projects using Cassandra
http://github.com/tjake/Lucandra Cassandra engine for Solr and Lucene search
http://github.com/jedisct1/scribe log directly to Cassandra from scribe
https://github.com/thobbs/flume-cassandra-plugin Cassandra plugin for Flume logging
https://github.com/flewton/flewton the extensible Netflow collector
http://esper.codehaus.org/ A Cassandra backend for Esper CEP
https://github.com/canausa/cassandra-teaspoon An simplification in managing the installation of Cassandra and Sun Java 1.6 on a Debian-like system.
https://sourceforge.net/projects/voltalog/ java library that enables you to manage the logs of your application, saving them in Cassandra.
https://sourceforge.net/projects/voltacriteria/ java library designed for those who want to integrate Cassandra database within their java application, providing intuitive methods for statement construction.