Does anyone know of any direct TCP/IP file transfer programs that work on both linux and windows? I'm thinking of something like the file transfer feature that some IM networks have, but not tied to any specific network or client. I basically want something where one person can run the program and listen for a connection, while the other person enters an IP address and connects to the first person. Is there anything like this out there, that anyone knows of? I've searched on google and freshmeat, and browsed through the debian package listings, but I haven't come up with anything.