Ruby:
Ruby Home Page
Ruby
Reference Manual
PLEAC Ruby - Programming Language Examples Alike Cookbook
Ruby Arekore (in Japanese)
Ruby Hacking Guide
Yppa Ruby Desho
RubyUnit
Mock Objects, a generic unit testing framework
The Pragmatic Programmers
Rubinius
GUtopla
Martin Fowler: Articles
TheServerSide.COM: Enterprise
Java Community
Misc:
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The
Collection of Computer Science Bibliographies
Patterns Home Page
Catalog of Free
Compilers and Interpreters
Dr Dobb's
Joseph Bergin @ Pace University
OO Shape Examples by Chris Rathman
the Design Pattern project at IBM Research
Douglas C. Schmidt's page
Computer Languages History
Cunningham & Cunningham, Inc.
atmarkit
ITpro
Free/Libre and Open Source Software Metrics
FLOSSmole
Workflow Management Coalition
InfoQ JP