SSAddin [1] is an Excel-DNA based XLL Excel Addin. I've recently added Baremetrics & Google Analytics support to the existing Quandl & Tiingo capabilities. Source is on github [1], and binaries are here [2]. License is Apache 2.0[1] https://github.com/SpreadServe/SSAddin
[2] http://spreadserve.com/s3/downloads.html