Good free FTP Client Library (for Windows C++ commercial apps)?
You need Ultimate TCP/IP which is now free!
http://www.codeproject.com/KB/MFC/UltimateTCPIP.aspx
You get FTP. HTTP, SMTP, POP and more.
You won't regret it.
What Java FTP client library should I use?
Check out Apache commons-net, which contains FTP utilities. Off the top of my head I'm not sure if it meets all of your requirements, but it's certainly free!
Recommend a solid .Net FTP library
Why not System.Net.FtpWebRequest?
Any Suggestion about Free FTP Server for Testing
FileZilla is very widely used, so I don't know what kind of problem you are having with it. But you could alternatively use a python based server http://code.google.com/p/pyftpdlib/
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