See also:
AppForge Develop applications for the Symbian Operating System using Visual Basic and AppForge. http://www.appforge.com/products/enterprise/crossfire/index.html
LEA Netbook Olten Tools and programs for the PSION Netbook running on LEA system. In German. http://home.datacomm.ch/leaolten/
Olaf Flebbe Perl on EPOC, documentation on the Psion Link Protocol (PLP) and a Psion5 SDK for Linux. http://www.oflebbe.de/oflebbe/
OPL Miscellany 3lib's hints page for OPL. http://3lib.ukonline.co.uk/opl32.htm
OPX List at McAleely.com A list of OPXs (OPL extensions) for EPOC, Psion and Geofox PDA's. http://www.mcaleely.com/psion/OPX/
Symbian Developer The people behind the EPOC operating system. Symbian's mission is to set the standard for mobile wireless operating systems and to enable a mass market for Wireless Information Devices. http://www.symbian.com/developer/
Twiddlebit Software EPOC and SIBO (Psion) project planning and advanced OPL development tools (Plan, Plan5, OPP, OPPDBG, GPRINTER.OPX). http://www.twiddlebit.com/
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