The OpenSees source code is now stored on GitHub. GitHub provides the means to store not only the current version of a piece of source code, but a record of all changes (and who made those changes) that have occurred to that source code.

Anyone can check out the code via anonymous access using a program callled Git, but only certain people have the ability to check in. Those people, basically, are people who I trust not mess up the code. Read our document on hacking OpenSees to find out how to get the ability to check in and how programmers without this ability can check in their code.

For those wanting to obtain source code for a previous release of OpenSees, the release tags for some recent releases are included in the changeLog.

Anonymous GIT Access

This project can be checked out through anonymous access with the following command (use the dos prompt if on a windows machine).

  git clone

If you wish to check out a secific release can download a zip file directly from the GitHub OpenSees Releases Page.