edtFTPj / PRO is a Java FTP library supporting secure FTP via FTPS (FTP over SSL) and SFTP (FTP over SSH). Features include multiple, simultaneous transfers by use of FTP connection pools, asynchronous transfers and SOCKS and HTTP proxy support. Includes powerful FTP scripting.
Open source Java FTP library widely used on thousands of projects. Supports active and passive modes, binary and ASCII modes, resuming of transfers, most FTP extensions.
edtFTPnet / Compact is a world-beating, affordable FTP library for the .NET Compact Framework (.NET CF). It is a robust and proven FTP .NET CF library.
edtFTPnet / Express offers a set of robust and powerful, easy-to-use components and controls that make transferring files using the FTP protocol a breeze.
A .NET FTP library written in C#.
Integral FTP project allows web developers to embed a fully featured FTP GUI client directly into their web pages.
uniFTP is a cross-platform FTP shell and scripting engine.