Diogenes is a tool for searching and browsing the Latin and ancient Greek texts published on CD-ROM by the Packard Humanities Institute and the Thesaurus Linguae Graecae. It comes as an easy-to-install stand-alone application for GNU/Linux, Mac OS X, and Windows, based on the Firefox browser (i.e. Xulrunner). Alternatively, it can be installed by a network administrator as a server on a local network, and users then access it via an ordinary Web browser. There is also a command-line tool which can optionally format output as LaTeX instead of HTML.
Hodie prints the current date and time to stdout in Roman numerals, with grammatically correct Latin. Complete with Id., Kal., Non., pridie, postridie, bis, and all the other nice annoyances. As an option, it even provides you with current date according to Roman calendar -- that is 'ab urbe condita'; after Rome was built.
jbofihe (or more correctly jbofi'e) is a parser for checking the grammatical correctness of Lojban text. It also provides approximate translations of Lojban into English. (Lojban is a constructed human language with the interesting property that its grammar can be cast into a form that Bison can parse.) The package includes cmafi'e (a smaller version without grammar checking), and a program to aid lujvo (compound word) construction.
Saxogram is a script which generates vocabulary lists from texts written in foreign languages. So far it has dictionaries for Latin, German, and Italian. Saxogram was written with extensibility in mind. Thus, other languages can be "plugged in" as modules. All that is needed is a dictionary and a small amount of code. The purpose of the program is to speed up language learning. Too much time is spent looking up every third word. This isn't practical when learning a new language. Generating a vocabulary list that can be used in parallel to ones reading is helpful.
Emdros is a corpus query system for storing and searching linguistically annotated text. It is very generic, supporting almost any kind of annotation from almost any linguistic theory. All linguistic levels of analysis are supported, including phonology, morphology, the lexical level, syntax, and discourse. The core libraries act as a middleware layer between a client and an underlying SQL database. MySQL, PostgreSQL, and SQLite are supported.