Jellyfin is a personal media server.
RecentX is an innovative launcher that gives you instant access to your files, folders, programs...
$19.95 / One-off (A single license can be used on up to 2 computers)
TagTower - A personal file tagging and document tagging utility.
allTags is a free, tag based file management application.
Advanced File Search Utility for Mac OS X
Todoist is a to-do list that helps you get organized, at work and in life.
TagFlow is an intelligent files manager that use tags for organize your documents.
DiviFile: A Hub for Your Information
Advanced CATaloguer allows adding, searching out files stored on all kinds of digital media.
Vidine is a media center and thumbnail video clip manager.
TMSU is a tool for tagging your files.
With Numento, you will be able to efficiently and easily manage your collection.