*[http://harmonyagreements.org/index.html Project Harmony] offers not only a "harmonizing" view of Contributor Agreements, but also the inter-company contributor agreements so that employees of one organization can effectively collaborate on external FOSS projects that the company uses.
*[http://wiki.civiccommons.org/Contributor_Agreements The Civic Commons Wiki] offers a complete run down of CLA and CAA examples
Please note that while Contributor License Agreements can be a good place to see proper legal text addressing complex issues of Copyright, Patents and Trademarks, they are not good practice ''operationally''. See Bradley Kuhn's perspective from 2014: [https://sfconservancy.org/blog/2014/jun/09/do-not-need-cla/ You do not need a CLA]
==Is it Viral?==