Arta
Audio Tester
Audio Cad
AJ Horn
BassBoxPro
BoxSim
Online speaker/filter calculations
Calculators online
FuzzMeasure
HolmAcoustics
Kirchner
Liberty Inst. Praxis
NuHertz Filter Solutions
Room Eq Wizard REW
Rightmark Audio Analyser
SpeakerBoxLite
SubBox Pro kastontwerp software
Speakerbuilding.com
SoundTechnology
True RTA
WinISD