Tagz is described as ': A file can only be in one folder. But with tags, a file can have multiple associations. However, most filesystems only support folders but not tags. That is what Tagz solves' and is an app in the File Management category. There are more than 10 alternatives to Tagz for a variety of platforms, including Windows, Mac, Linux, Google Chrome and SourceForge. The best alternative is TagSpaces, which is both free and Open Source. Other great apps like Tagz are Tabbles (Freemium), Keepmark (Paid), Tagstoo (Free, Open Source) and TMSU (Free, Open Source).
Tag files, along with your peers to organize and find them. Works on local or network drives and in the Cloud. Tabbles features collaborative tagging, auto-tagging rules, an Outlook Plugin, a Chrome extension and is well integrated with Windows,.
Keepmark allows you to organize your files, documents, emails, bookmarks, tasks and generally - resources. Its also an efficient solution for finding your resources by names, meta-data and document content.
TMSU is a tool for tagging your files. It provides a simple command-line tool for applying tags and a virtual filesystem so that you can get a tag-based view of your files from within any other program.
Because files can fit in many different categories and contexts, a tagging approach to managing them, like the kind we have for photos, bookmarks, and blog posts, makes sense. Elyse provides tag management for your files, with up to 30 tags in the free version.
TagLists is a small application for OS X that allows you to quickly see which files you've tagged with particular tags. It uses the OpenMeta tagging system, which means that it finds files that have been tagged with any of the applications that support OpenMeta.
Tagger is a small application for OS X that can be used for quickly adding arbitrary textual tags to files. It uses the OpenMeta system for saving tags, so the tags you add with it will be readable (and editable) by all the other applications that support OpenMeta.