LABB-CAT is a browser-based linguistics research tool that stores recordings and regular-expression searchable text transcripts of interviews. The search results, entire transcripts, and media, can be viewed or exported in a variety of format
Artha is a handy thesaurus based on WordNet with distinct features like global hotkey look-up, passive desktop notifications, regularexpression based search, etc.. Artha may be used as a free open-source replacement to the proprietary WordWeb Pro.