- fivefilters.org
- maui-indexer (downloadable too)
- TerMine (downloadable too)
- AlchemyAPI keyword / terminology extraction
- Terminology Extraction by Translated Labs
- Apsic Xbenc
- WebCorp
- AntConc
Free Term Extractors for Download (APIs, Code, and Desktop Versions)
- Wordfast (part of PlusTools 4)
- KEA
- topia.termextract
- Araya Bilingual Term Extraction Tool