add tools

tools/lingeling.md

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+date = 2025-06-07
+draft = false
+title = 'Lingeling'
+subtitle = 'SMT Solver'
+links = [
+    { title = "Homepage", url = "https://fmv.jku.at/lingeling/", icon = 'fa-solid fa-home' },
+    { title = "Source Code", url = "https://github.com/arminbiere/lingeling", icon = 'fa-brands fa-github'  },
+    # { title = "Playground", url = "https://jfmc.github.io/z3-play/", icon = 'fa-solid fa-gamepad' }
+]
+applications = ['SAT Solver']
+developers = ['Johannes Kepler Universität Linz']
+licenses = ['MIT']
+# inputs = ['']
+interfaces = ['CLI']
+maintenance = ['Actively Maintained']
+# techniques = ['CDCL']
+# publications = ['deMoura2008']
++++
+
+<!-- {{<closed-source>}} -->
+Lingeling is a SAT solver.