CUFTS  is an open source OpenURL link resolver designed for use by library consortia. But its database is also useful for other things. Journal Search  answers the following questions: Which online database indexes which magazines and newspapers? Which online databases contain the full text for a particular journal? What are the dates covered for a particular title in a particular database? Additionally, you can use the Resource Comparison  tool to analyze two different online databases to find out what the overlap is and which titles are unique.
*The JAKE  database hasn't been updated in more than two years.