Massive parallel data platform for analytics, machine learning and AI
Cross-platform C++ libraries for building network applications
An interactive process viewer
The systemd system and service manager
CEED Library: Code for Efficient Extensible Discretizations
High-speed, 3D-friendly, TightVNC-compatible remote desktop software
3D Without Boundaries
A portable, multi-platform, command-line driven graphing utility
Personal and small-business finance manager
Computer Algebra System written in Common Lisp
Open Source Monitoring System for performance and availability.
A barcode encoding library supporting over 50 symbologies.
Nagios network monitoring software is enterprise server monitoring
Scanning probe microscopy data visualisation and analysis
Model Railway CAD program
Viking is a free/open source program to manage GPS data
https://youtu.be/7pQHcFfrpDI
A Forth compiler with a little difference
Cross-platform, scientific graphics plotting library
Arbitrary-precision CRC calculator and algorithm finder
The cross-platform library behind the Hugin photo stitcher
Calculates income tax form entries, helps do your taxes.