TagSpaces - TagSpaces is an open source platform for personal data management. With TagSpaces you can manage and organize the files on your laptop, tablet or smart phone.
Leap - With Leap you find things based on your natural memory of that file.
Taglists - TagLists is a small application for OS X that allows you to quickly see which files you've...
DEVONthink - DEVONtechnologies develops DEVONthink, DEVONagent, and other Mac and iOS apps for document and information management and web research.
Elyse - The free version allows up to 30 tags.
Keepmark - Keepmark allows you to organize your files, documents, emails, bookmarks, tasks and generally -...