Classical languages

• Dicionário latim-português.
• Latin Alternative Dictionary. Dictionary of bad language and other words not easily found in a conventional dictionary. 12 entries.
• Latin grammar and glossary. In English.
• Latin: Grammar, Exercises and Answers. In Spanish.
• Latin for travellers. Basic words and expressions in Latin.

Greek

• Perseus Project. Everything related to classic Greece: history, maps, language (with dictionaries), mailing lists... There is a better software version (Perseus 2.0) just for Mac, for the moment.

Dictionaries

• Virtual dictionary of Greco-Roman mythology. In Portuguese.

Forum

• Latín A forum for the study of this language. To subscribe, e-mail to listproc@lists.colorado.edu, with the body "subscribe latin".
• sci.classics A newsgroup about history, languages, art, etc.

Software

• Centaur Systems. Software products for learning and usage of Latin and ancient Greek.

Libraries

• Project Libellus. A virtual library with free access to classical texts.