SnapDB - Simple, flat-file database/list app.
LibreOffice - Base - Base, database, database frontend, LibreOffice, ODF, Open Standards, SQL, ODBC
sPlaylistMaker - sPlaylistMaker allows you to easily create .m3u and .m3u8 playlists
Altova XMLSpy - The XMLSpy XML Editor is a powerful tool for editing XML and related technologies. It is the only XML Editor with patented SmartFix validation, enterprise-grade editors, converters, debuggers, and code generators.
Playlist Creator - At oddgravity you find useful tools for Windows and exciting games for the small deflection in between. All programs are Freeware and can be downloaded directly from the homepage.
My Visual Database - Using My Visual Database, you can create databases for invoicing, inventory, CRM, or any specific purpose.