They are totally different snippets and behave differently. DocMan has rudimentary checkin/checkout features and stores the files’ metadata in the database; files must be uploaded via the form and are stored with a name based on the insert value of the metadata +.dat. If your site has safe_mode turned on, it’s quite likely you won’t be able to use DocMan, since you probably won’t be able to upload the files with a PHP script to a directory outside your web space.
I haven’t put DocMan in the repository because I intend to work on it and make a number of improvements. Someday. When I have the time and energy
For a simple download capability, I use
FileDownload, which just scans a given folder and lists the files it finds there using a chunk template for display. I’m not sure how it would behave with files external to your web root if safe_mode is turned on.
FileCabinet is something else altogether; I haven’t looked at it so I’m not able to say how it differs from the above two snippets.