Users.md: Add PostgreSQL
@@ -133,6 +133,7 @@ format files
- [Planner](https://github.com/alainm23/planner), task manager with Todoist support designed for GNU/Linux
- [Playerctl](https://github.com/acrisci/playerctl), mpris command-line controller and library for spotify, vlc, audacious, bmp, cmus, and others
- [Polari](https://gitlab.gnome.org/GNOME/polari), an IRC client
+ - [PostgreSQL](https://www.postgresql.org/), an advanced open source relational database
- [qboot](https://github.com/bonzini/qboot), a minimal x86 firmware for booting Linux kernels
- [radare2](https://github.com/radare/radare2), unix-like reverse engineering framework and commandline tools (not the default)
- [rmw](https://remove-to-waste.info), safe-remove utility for the command line
