CDNsim is an OMNeT++-based simulator for Content Distribution Networks (CDNs), developed at the Department of Informatics, Aristotle University of Thessaloniki, Greece. Its main features are:

• Cooperative push based content management policy.
• Non-Cooperative push based content management policy.
• Cooperative pull based content management policy.
• Non-Cooperative pull based content management policy.
• LRU cache replacement policy.
• STATIC cache policy.
• TCP / IP networking.
• Wizard for creating self-contained simulations (bottles).
• Utility for executing unattended simulations.
• Utility for automatically generating results' reports.
• Utility for converting Apache log files into CDNsim trace files.
• Extensible by implementing modules in the form of libraries.
• Runs on Windows and Unix like systems.

Documentation, publications, source code and screenshot(s) can be found at the CDNSim home page.