> Recently, I tried to research some of the new CMS/API platforms that have been released in the last year.

For APIs, there is a great resource: http://www.programmableweb.com/apis

For CMSes, there is a dedicated website: http://www.cmsmatrix.org/

Alternatively, you can search GitHub for CMSes from this year: https://github.com/search?q=CMS+created%3A>2013-11-07