• xlog

• XTemplate (XML Template Engine)
• Ruby/FLTK (FLTK binding)
• Ruby/PAM, PAM/Ruby
• Ruby/Quota
• Ruby/NIS
• ruby-optimizer
• ruby-shadown
• Ruby/LDAP
• Ruby/DL
• TDP4R (Top-down Parser Library for Ruby)

Also, you can see my applications and libraries here.