Dynasys-Psion Solutions Provider: Accessories for Psion WorkAbout
Konstantin Saliy: Software for the S3a, programmers' FAQ and a Russian Psion page (Windows 1251).
Kylom: Productivity software for Symbian phones.
Phil Spencer: Popular shareware and freeware programs for the Psion 3a, 3c, Siena, Series 5 and Geofox-One machines.
SeePsion: Read, write directly Psion Base serial 3 with logical synchronization. For PC Windows 95, 98, NT.
The Psionics Files: A project for collating information about programming the Psion Series 3 and 3a which is not in the manuals provided with the machines.