Ruby.CHannel
- Ruby information, downloads, resources, RWIKI Plus, online interpreter (try Ruby online), interactive tutorial, Programming Ruby Interactive. The last two combine text examples with the online interpreter to run them. English, Deutsch.
- http://www.ruby.ch/en/rubymain.shtml

freshmeat.net: Ruby
- Root Ruby page there, hosts near 300 open source projects.
- http://freshmeat.net/browse/835/

Ruby
- Many useful, interesting applications, libraries: scripts, patches, extension modules, documents. English, Nihongo.
- http://ttsky.net/ruby/

Ruby/Password
- Set of methods to create, verify, and manipulate passwords. Has interface to CrackLib library commonly used to check password strength. Intended use: system administrators who need programs to prompt for, generate, verify, and encrypt passwords.
- http://www.caliban.org/ruby/ruby-password.shtml

Radiuslib
- Full RADIUS protocol and utility library, protocol conforms to RFCs 2865, 2866; utilities are useful for many common system administration tasks. Description, documents, downloads, contact. [Open Source, GPL]
- http://www.nodewarrior.org/radiuslib/

Funaba.org: Ruby
- Applications: cal, dvipc, gtkcal, luna, nqt, rar, prof, stared, tkcal, tr-list, wc, Just another Ruby hacker; Libraries: calendar, date2, delay/force, once, smf. By Tadayoshi Funaba.
- http://www.funaba.org/en/ruby.html

Zakki-Cho
- Software and several translated articles on programming and running Ruby on Windows. "Zakki-Cho" = "Notebook" in Japanese.
- http://homepage1.nifty.com/markey/index_e.html

DbTalk
- Interactive GUI-based tool for database querying, programming, administering, etc. Has 3 basic parts: SQL editor, query result viewer, database structure viewer. [Open Source, GPL]
- http://www.insula.cz/dbtalk/

Ruby == Perl.succ
- Ruby 1.4.2 FreeBSD port, tips, memoranda.
- http://www.bsdclub.org/~yasuf/ruby/index.en.html

PalmSync
- Ruby library for synchronizing PalmPilot with DBMSs.
- http://www.threeweb.ad.jp/~nyasu/palmsync/e.html

Ruby/Gtk Example: Tic-Tac-Toe
- Short introduction to Ruby/Gtk by example. Shows how to inherit Gtk+ elements and the use of a recursive MiniMax tree search.
- http://perplex.schmumpf.de/dev/tictactoe/ruby/

Atelier in the Blue Sky
- Text preprocessor, aftercommit, CD player, extension library for zlib, patches.
- http://www.blue.sky.or.jp/atelier/Welcome.en