DAW – Digital Audio Worksttion – Open source – Reaper is a full suit for Audio works, compromising all the aspects of the production chain including video sync.
A new REAPER 6 license includes unlimited free updates through REAPER version 7.99. Frequency varies, but updates are typically released every few weeks.
These updates include bug fixes, feature improvements, and significant new features, all of which are free. Updates only take a minute or so. All preferences and configurations are preserved, and forward and backward compatibility are maintained.