Google is a good place to locate calls for papers or calls for proposals that might be posted on websites for associations or publishers. Use quotes around the phrase "call for papers" for more precise phrase searching.
Cabell's Directories of Publishing Opportunities contains a wealth of information designed to help researchers and academics match their manuscripts with the scholarly journals which are most likely to publish those manuscripts. The Directories index journals according to twenty-four (+/-) different topic areas. The electronic searchable Directories provide valuable information for each journal. With this information, authors can easily submit their manuscripts to the journals most receptive to their research. Cabell's Directories of Publishing Opportunities is a vital resource for increasing the publishing effectiveness of professors, graduate students, and researchers.