Audacity

Youtube videos by Ken Olson about the basics of Audacity and about label tracks, regions and markers.

Cubase LE (limited edition) free with the purchase of a Steinberg Audio Interface

Band in a Box, made by PGMusic: software to use for play-alongs of  songs, standards, etc. check www.pgmusic.com  or their youtubechannel https://www.youtube.com/@pgmusicinc

Garage Band included with Mac OSx.

Audio Timeliner a very nice (visualization) tool for musical analysis by annotating soundfiles. Made by Brent Yorgason of Brigham Young Universty.

Spotify

Quicktime

Finale

Quick start videos for Finale

Online tutorials for Finale

Sibelius

Sonic Visualiser 

CMapTools

Adobe Reader