SHERPA RoMEO is an online resource which aggregates and analyses publisher open access policies from around the world and provides summaries of self-archiving permissions and conditions of rights given to authors on a journal-by-journal basis. Repository managers and authors can use this service to find out which version of their articles can be self-archived under what condition.
University of Southampton Library provides a comprehensive guide for the definitions of article versions to be uploaded in a repository as well as explaining Creative Commons license open licences.
About implementing open access clauses in publisher licenses, check out COAR report called Open Access Clauses in Publishers’ Licenses – Current State and Lessons Learned published in 2014/
Creative Commons open licences are explained in detail with examples on their web page.
Repository softwares can be configured to have licensing step in the uploading process. For instance, for DSpace visit their Wiki page on "Licensing"
Blimunda Project : Publisher policies of Portuguese journals regarding the self-archiving.
DULCINEA: Summaries of editorial policies of Spanish journals regarding self-archiving.
Heloise: Publisher policies of French journals regarding self-archiving.