Kriterion is a document retrieval and categorization engine capable of full text searching. There is no need for keyword or context-based information.
Development and support of OCFA have been discontinued. the code has moved to these github repositories: https://github.com/DNPA/OcfaLib https://github.com/DNPA/OcfaArch https://github.com/DNPA/OcfaJavaLib https://github.com/DNPA/OcfaModules https://github.com/DNPA/OcfaDoc If you are interested in contributing to ongoing work on the creation of a community maintained OCFA inspired computer forensic framework, please join the Mattock/MattockFS community page on G+: https://plus.google.com/communities/102487198908055860744
Xapian is a Search Engine Library, written in C++ with bindings for Perl, Python, PHP, Java, Tcl, C# and Ruby. Xapian allows you to easily add advanced indexing and search facilities to your applications. See www.xapian.org for more information.
pLsearch was created to assist System Administrators in their quest for grep'ing logs and other files for specific content, and then spitting it out in a format that is generally easy on the eyes.