A hot folder application prints a file by adding it to the hot folder on your printing PC. The whole process of adding and syncing the files is done by our Dropbox integration.
A short list of hot folder utilities depending on your system and printer setup:
DNP's Hot Folder Print Utility is compatible with Windows and Mac and is specifically designed for DNP printers.
Mitsubishi Electric's PS Events suite has an integrated hot folder utility which works with Windows and the reliable Mitsubishi dye-sub printers such as the CP-D70DW.
Breeze Hotfolder Prints is a neutral hot folder application primarily for Windows PC's.