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[libguestfs-talks.git] / 2020-frama-c / 9200-alternatives.html

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   is a formally verified subset of the Ada programming language
   (tagline: <i>"You simply can't write better code"</i>).
 
-<li> <a href="http://klee.github.io/">KLEE</a> has similarities
-  but is not a formal proof system.
+<li> <a href="https://lamport.azurewebsites.net/tla/tla.html">TLA+</a>
+  is useful for proving distributed systems over time.
+
+<li> <a href="http://why3.lri.fr">Why3 / WhyML</a>
+  can be used for constructive proofs.
 
 <li> <a href="http://compcert.inria.fr/">CompCert</a>
   is INRIA's verified C compiler (not open source).
+
+<li> <a href="https://gitlab.mpi-sws.org/iris/refinedc">RefinedC</a>
 </ul>