PLP Tools Project - Tool for Unix that allows EPOC devices to be mounted in the file system by users.
Project Info - PsiApple - An Apple ][ emulator for Psion Series 5. Supports text, lores, hires, sound, and 2 virtual floppy drives. Goes about 0.4-0.8 Mhz on a Series 5.
Psiconv - EPOC file format data conversion utilities for Linux. Mainly to convert Psion Word format into RTF. Being built into AbiWord.
PsiONtrack - Allows you to mount your EPOC device under BeOS. No conversion in this program but drag and drop is fully implemented.