Cross platform (lin/win/mac) geographical information system (GIS)
Open Source Routing Machine - C++ backend
2D & 3D TeX-Aware Vector Graphics Language
A library for scientific data visualization
2D molecule editor
Calculator++
Gerber to PDF converter
Collection of fast and optimized assembly libraries for x86-64 Linux
Mathematical & engineering components for software development
C++ header-only library that simulates GLSL math
Scientific Visualisation Made Easy
SCADA HMI for substations, IoT and automation applications
A Windows-based viewer currently supporting CDR & 2D DXF files
Scanning Probe Microscopy Controller and Data Visualization Software
A set of freeware applications for viewing/processing P-CAD files.
Google Earth Enterprise - Open Source
Interactive visualization of plate tectonics.
Interactive, thoroughly customizable maps
PPface is vector processor emulator / simulator
Multidimensional array implementation