Perl

Counts blank lines, comment lines, and physical lines of source code in many programming languages.

A lightweight terminal app for iOS with multi-window support, offering Python 3, Lua, LaTeX, and many other commands and tools, providing a Unix-like command-line experience on iPadOS.

A Perl client used to update dynamic DNS entries for accounts on a wide range of dynamic DNS services, using curl for internet access.

A framework-agnostic database change management tool using native SQL scripts, supporting PostgreSQL, MySQL, SQLite, Oracle, and many other databases.

An open-source web application for archival and reading of manga/doujinshi, lightweight and Docker-ready for NAS and servers.

A firewall concealment tool implementing Single Packet Authorization (SPA), which grants access to services hidden behind default-drop firewall policies using a single encrypted, non-replayable, and HMAC-authenticated packet.

An agent tool for GLPI that collects and reports system information to the GLPI server.

A community-maintained fork of ConfigServer Security & Firewall (CSF) — a robust Linux iptables/nftables firewall with a free ipset blocklist service.

A generic management agent that performs tasks according to its own execution plan or on behalf of a GLPI server, supporting system inventory, network discovery, and deployment.

A free, open-source Raspberry Pi-based display calibration suite with a precision HDMI test pattern generator, supporting SDR, HDR10, HLG, and Dolby Vision calibration.