A few years ago I started a series called “Metadata Month” (series 1, series 2). That explored how to add the valuable bonus text info known as metadata to sound effects to aid searching and using field recordings.
In one of those posts I took a stab at listing every “metadata app” capable of managing sound libraries, browsing sound clips, using and adding metadata, and transferring sound files.
There were 15 apps in that post. Well, it’s been three years and things have changed. Recently I refreshed the post with new info.