Eurodicautom is an excellent on-line dictionary and terminology database created and maintained by the European Commission. It supports all the EC languages.
Club Cycom software includes a terminology management system (termbase creation, editting and query tool) which supports DXLT, MARTIF, ISO 12200 and TBX standard formats for terminology exchange with other systems. It understands more than 53 ISO 12620 data categories without any user programming. It runs off-line and the full version is rentable from 3 euros/month. Compatible with all platforms (MAC-X, Windows PC, Linux, Solaris, JRE 1.4) provided they have more than 64Mbytes of memory.