1 Theory of Computing: An Open Access Electronic Journal in Theoretical...
http://theoryofcomputing.org/  
""Theory of Computing" (ToC) is an online journal dedicated to the widest dissemination, free of charge, of research papers in all areas of theoretical computer science." -theoryofcomputing.org-introduction 
2 Directory of open access journals
http://www.doaj.org/doaj?func=subject&cpid=114  
A list of open access journals in computer science. Several are international publications. 
3 IJCS - International Journal of Computer Science
http://www.waset.org/ijcs/  
"International Journal of Computer Science (IJCS) (ISSN 1306-4428) is a scholarly open access, peer-reviewed, interdisciplinary, quarterly and fully refereed journal focusing on theories, methods and applications in computer science." -IJCS - homepage 
4 Logical Methods in Computer Science
http://www.lmcs-online.org/index.php  
"Logical Methods in Computer Science is an open-access journal. All journal content is licensed under a Creative Commons license." -LMCS - homepage 
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