Honeyd Conclusion

Honeyd provides a framework for creating virtual machines and networks that helps solve security problems.
Very flexible and easy to configure.

Honeyd Software available freely under BSD-license:
http://www.citi.umich.edu/u/provos/honeyd/

More information about the Honeynet Project:
http://www.honeynet.org/

More information about honeypots:
http://www.tracking-hackers.com/