LICS - IEEE Symposium on Logic in Computer Science: an annual international forum on theoretical and practical topics in computer science that relate to logic in a broad sense. - http://www.informatik.hu-berlin.de/lics/
FMOODS - Formal Methods for Open Object-based Distributed Systems. An annual series of conferences. - http://www.cs.kent.ac.uk/research/netdist/fmoods/
MFPS - Mathematical Foundations of Programming Semantics. An annual series of meetings. - http://math.tulane.edu/~mfps/
NMRW - International Workshops on Nonmonotonic Reasoning. - http://www.kr.org/RelatedConferences.html
LOPSTR - International Workshop on Logic-based Program Synthesis and Transformation. Held annually since 1991. - http://www.cs.man.ac.uk/~kung-kiu/lopstr/
Formal Methods - World Congress on Formal Methods (FM). - http://dblp.uni-trier.de/db/conf/fm/
Set Theory and its Neighbours - A series of one-day meetings held at the London Mathematical Society, De Morgan House, Russell Square, London. - http://www.ucl.ac.uk/~ucahcjm/stn.html
TABLEAUX - The International Conference on Automated Reasoning with Analytic Tableaux and Related Methods, held every year since 1992. Links to individual meetings. - http://i12www.ira.uka.de/TABLEAUX/
CADE - Conference on Automated Deduction. Annual conference series under the auspices of the Association of Automated Reasoning. - http://www.cs.albany.edu/~nvm/cade.html