AudioShell – ID3 tag editor & Windows shell extension

AudioShell adds an ID3 tag editor and files rename tools into Window’s system music files pop-up menu. AudioShell property shell handler adds detailed music tags information into Windows Explorer columns and Preview pane, thumbnail handler adds thumbnails with album art into Explorer. Full Unicode and 64 bit support.

Vista/7/8/8.1 32/64
XP

Freeware
Windows

Audacity – A multi-track audio editor & recorder

Audacity is a popular and award winning multi-track audio editor and recorder.

Download

Website
FAQ
Documentation
Tutorials
Tips
Beginner’s Resource Guide
Wikipedia

Freeware
Linux / Mac / Windows
Open Source

XLD – Mac CD Ripper

X Lossless Decoder (XLD) is a tool for Mac OS X that is able to decode / convert / play various ‘lossless’ audio files. The supported audio files can be split into some tracks with cue sheet when decoding. It works on Mac OS X 10.4 and later. XLD is Universal Binary, so it runs natively on both Intel Macs and PPC Macs.

Website
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Freeware
Mac

dBpoweramp Music Converter – mp3 converter, FLAC, WAV, AAC & Apple Losslesss. Free 21 day trial, download & convert

dBpoweramp Music Converter – mp3 converter, FLAC, WAV, AAC and Apple Lossless. Free Download (21 day full trial), start converting today

Source: dBpoweramp Music Converter

Windows