Below is a list of various software technologies that I know and use

Fluent:

• Languages:
• Ruby: Rails, Ramaze, Sequel, Poro, Rack, RSpec, RDoc
• Javascript: jQuery
• Obj-C: Cocoa, Cocoa Touch
• C: stdlib
• Mathematica
• Databases: PostgreSQL, MongoDB
• Standard Data Formats: XML, JSON, HL7 (Medical)
• Markup Formats: HTML, CSS, LaTex
• SCM: Git, Subversion
• Operating Systems: MacOS X, Ubuntu Linux

Proficient or Once Fluent:

Languages:
• Java
• Ruby: Sinatra
• Erlang
• C++
• Lua / LuaState (C interface)
• PERL
• PHP
• SCM: CVS
• Operating Systems: Windows XP, BeOS

Cursory Experience (e.g. spent a few days learning it and playing with it):

Languages:
• OCaml
• Scheme LISP
• C: OpenGL
• JavaScript: SproutCore