Collection of software that matters in the long-term.

Build systems

• GNU Make (notes)

Databases

• SQLite

Editors

• Vim

Markup languages

• reStructuredText - powerful plaintext markup language with a spec.

Operating systems

• OpenBSD

Programming languages

• Go - pragmatic tool for pretty much anything
• Lua - if you need an embedded scripting language
• C - for the low-level stuff