Customized versions of free software programs:

• WMMail, mail notifier for GNU/Linux, from the official version 0.64.
• WMRecord, sound recorder for GNU/Linux, from the official version 1.5.0.
• PerlPP, text template processor written in Perl, from the official version 0.5.
• Yacas, computer algebra system, for the Agenda VR3 PDA.

Translations to Spanish:

• Zotero, the bibliographic data (metadata) management tool.
• Dublin Core NeViewer, a Dublin Core metadata viewer for web pages.