American Radio Relay League: www.arrl.org
Deutscher Amateur-Radio-Club e.V: www.darc.de
PSK31 Home Page: aintel.bi.ehu.es/psk31.html
WinPSK: www.qsl.net/ae4jy/winpsk.htm
LinPSK: linpsk.sourceforge.net
Troll Tech (Qt): www.trolltech.com
FFTW (Fastest Fourier Transform in the West): www.fftw.org
PortAudio—portable cross-platform Audio API: www.portaudio.com
Debian package for LinPSK: packages.debian.org/unstable/hamradio/linpsk
Amateurfunk mit Knoppix / Amateurradio with Knoppix: www.afu-knoppix.de
WM2U's PSK31 Page: www.qsl.net/wm2u/psk31.html
Q code: three-letter code signals: en.wikipedia.org/wiki/Q_code
Amateur Data Interchange Format: www.hosenose.com/adif
KDevelop: Integrated Development Environment for KDE: www.kdevelop.org
