GEOCalculator
Geocalculator is a calculator for structural data. Free for students and teachers. Registration required for other users.
GEOrient
Stereonet and rose diagram plotting program Disk1. Free for students and teachers. Registration required for other users.
PaleoMag Tools
A wide variety of applications in directional statistics, geology, palaeomagnetism, geomagnetism, archaeomagnetism, structural geology etc. Shareware