Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
oTranscribe - A free web app to take the pain out of transcribing recorded media
Reaper - Reaper is a focused digital audio workstation (DAW) developed by Cockos. In the creation of the software, the digital audio technology company intended to make audio editing accessible to the masses.
Listen N Write - Listen N Write can be used to play and transcribe ordinary audio and video recordings (WAV, MP3...
FL Studio - Image-Line's FL Studio, now on it's 12th version, is a well-known music production suite and the most popular beat processor on the market, due no doubt to its longevity. Read more about FL Studio.
Sonix - Automatically convert audio & video to text in minutes