Frevo - Find freeware software for your Psion Revo or Revo Plus palmtop organizer. Most titles will also work on Psion's Series 5, Series 5mx and Series 7 computers, as well as the Geofox One and Ericsson MC218.

SymbianWare - Software for Symbian Series 90, Series 60 and Psion devices.

EPOCzone.com - Has links for the latest EPOC freeware and shareware titles.

Tucows Series 3 Page - Has software for the Psion Series 3 handheld computers.

Pscience5.net - Has freeware and news on EPOC and PDAs.

FreEPOC - Free software for Symbian devices.

Twiddlebit.com - Contains a range of software (both free and shareware) for Psion SIBO and EPOC (Psion, Ericsson,...) handheld computers.