Dumb FTP Server is the first FTP server for S60v3 devices. To be able to use it you'll need wifi capable device and (for now) a memory card. To be able to log-in after starting the server and selecting the access point you will need to either disable authentication (any user and password will do, very insecure) or generate an one-time token that is presumably only known to you and which will be invalidated after successfully using it as a password (any username is accepted).
How to get it:
1. Download Open C library and install it, in case you don't have it already.
2. Do the same for Open C++ component.
3. Download the server and install it.