Stacer
Stacer – free and open source optimization and monitoring tool for Linux system
Nutty
Nutty is a free and open source network utility that tracks devices on your network and checks data on bandwidth and speed
GNOME Password Safe
GNOME Password Safe – free and open source password manager that uses the KeePass v.4 format
KeeWeb
KeeWeb – free and open source, cross-platform password manager compatible with KeePass
KeePassXC
KeePassXC – free and open source, multi-platform and modern, secure password manager, which allows you to store passwords in an encrypted database and create strong passwords
KeePass
KeePass – free and open source, light-weight and easy to use software for secure password storage
Password Safe
Password Safe – free and open source, cross platform and convenient password manager
Heimer
Heimer – free and open source, multiplatform and simple software for creating mind map, diagram, and note-taking tool
VYM (View Your Mind)
VYM (View Your Mind) – free and open source, multi-platform tool to generate and manipulate maps which show your thoughts
Freeplane
Freeplane – free and open source, multi-platform software for creating mind map, as well as knowledge management