Tools for TLA+ specifications and PlusCal algorithms, including the Toolbox,
an IDE for writing specifications and running tools to check them.
This CodePlex site hosts the source code for the TLA+ Toolbox and TLA+ Tools.
The executable versions of the code are available for download through a link on the
TLA+ web site at research.microsoft.com/en-us/um/people/lamport/tla/tla.html
under the same M.I.T. license with which the source code has been released.
The TLAPS proof system can be downloaded from http://tla.msr-inria.inria.fr/tlaps/content/Home.html
For information about TLA+, visit the TLA+ web site.