Maybe OT since I am a hardware designer, and my final product is a piece of silicon, rather than a software package... but

• Perl
• Make, csh
• Verilog
• SystemVerilog
• Assembly (2 different languages: one for each on-chip processsor)
• C
• HTML, XML
• home-grown verification language
• SQL

Programmers aren't the only ones having all the fun :)