PuTTY : SSH and telnet client, developed originally by Simon Tatham for the Windows platform. PuTTY is open source software that is available with source code and is developed and supported by a group of volunteers.
You can download PuTTY here.
winSCP: Free SFTP, FTP and SCP client for Windows
Can be downloaded here
Gcov: Profiling tool you can use in conjunction with GCC to test code coverage in your programs.