Bill Casselman's frivolous page: A text-based dictionary (U of Washington) formatted with flex by Dr. Bill Casselman (UBC).
Glossary of Latin Words: The words found in records and other English manuscripts, but not occurring in Classical authors.
Latin Dictionary and Grammar Aid: About 15,000 words. Search by a whole word or a stem.
Latin-English/English-Latin Dictionary Client (Java): A Java applet written by Djun M. Kim (UBC), based on a Latin word list by Lynn Nelson (U of Kansas). Around 8 000 entries.
Latin=English Dictionary: Definitions of Latin words and translations from English.
More Latin Mottoes & Phrases - Classics Technology Center: Modern Latin abbreviations.
Perseus Project Online Latin Lexicon: Searchable in Latin or English. Contains links to source material.
Saxo Grammaticus: Vademecum in opus Saxonis et alia opera Danica compendium ex indice verborum. A medieval Latin dictionary.
The Hard Little Words: Latin prepositions, adverbs, and conjunctions, including some definitions of medieval usage.
Words by William Whitaker: A Net interactive version of WORDS program at Notre Dame. About 30,000 entries.