ShareFolder is a new app for WP7.5 "Mango" which allows you to browse into your Windows shared folders and transfer files and directories to your phone.
You can also:
- Create and delete directories.
- View images and text files.
- Save your MP3 and WMA files as ring tones.
- Save your image files to your phone gallery.
I have tested it on Windows XP, 7 and SAMBA.
No additional software is needed, only your Wi-Fi connection. ShareFolder is available on the Marketplace at a cost of $2.49. In the trial version you cannot copy directories and you can only save one connection configuration.
ShareFolder can be found in Marketplace here.