CS.Keylogger (or C-Sharp Keylogger, C# Keylogger) is a very very basic and simple freeware keylogger application released as open source.
Information collected from the CS Keylogger is saved as an XML file and unlike more developed programs of this nature, this one does not take screen snapshots nor does it necessarily log what has been copied to the clipboard.
This keystroke recorder does, however, support the sending of keylogs to a registered email address, accessible from the main application window.
Extremely basic, free and worth a try if it's what you're looking for.
From Mohammad Reza Taesiri:A Very simple key-logger using C#.CS.Keylogger 1.0
is licensed as Freeware
for the Windows operating system / platform without restrictions. CS.Keylogger is available to all software users as a free download (Freeware).
CS.Keylogger Virus and Malware Tests:
For security reasons, you should also check out the CS.Keylogger virus and malware test
that has been uploaded; additional CS.Keylogger screenshots may be available, too.