Nucular Archiving System for creating full text indices for fielded data. Python API, web, and command line interfaces. Fast. Very light weight. Concurrent read/writes with no possible locking issues. No server process. Proximity. Facets. Funny name.
psilib is a library allowing applications to process Portable Site Information (PSI). PSI is an XML-standard for enabling entire websites to be exchanged between content management tool without feature loss.