MIT StarLogo source-code project library. Object Pascal interpreter.
E is a a purely equational theorem prover for clausal logic with equality.
E 0.61 has been carefully tested on all CNF problems of the TPTP problem library, version 2.3.0, and showed no unexpected behaviour. Some results are available from the web site. The prover can produce checkable proof objects, a simple proof checker is included in the distribution. E is available as a source distribution for UNIX-variants. The system is distributed under the GNU General Public License.