Hey all,
I need a way to connect to an SFTP server so that I can edit files directly from my favourite text editor. ExpanDrive makes a virtual drive on your computer that corresponds to the directory list on a server.

Are there any free or open source application similar to this?

Thanks,
~Trey

well you can try ws_ftple its free ware available..
http://freeware.intrastar.net/ftp.htm
this link will help you

try FileZille ftp program. Its free.