PsiONtrack - Allows you to mount your EPOC device under BeOS. No conversion in this program but drag and drop is fully implemented. - http://jwgibbs.cchem.berkeley.edu/~pete/beos/psiontrack/
PLP Tools Project - Tool for Unix that allows EPOC devices to be mounted in the file system by users. - http://plptools.sourceforge.net/
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. - http://sourceforge.net/projects/psiapple/
Psiconv - EPOC file format data conversion utilities for Linux. Mainly to convert Psion Word format into RTF. Being built into AbiWord. - http://huizen.dds.nl/~frodol/psiconv/