Development

AppForge
Develop applications for the Symbian Operating System using Visual Basic and AppForge.
http://www.appforge.com/products/enterprise/crossfire/index.html

EikonWizard for Visual C++ and EPOC
An Eikon GUI creation wizard for VC5++.
http://www.mcaleely.com/freeware/EikonWizard/

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/

Software Development Tools for ARM Architecture
Software Development Tools for the ARM Architecture
http://www.arm.com/products/DevTools/

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/