Does anyone know a source for Javascript plugin and tags?

Hello all,

A couple of months back while researching best practices for Adobe Analytics implementations with DTM I found a source/site that provided a list and link to companies that developed third party Javascript plugin and tags, For instance there was a third party plugin for salesforce which my employer is also implementing, but now for some reason I cannot find it. I was hoping someone might know of some sources that provide information on such developers. Now that I have implemented Adobe Analytics and Target with DTM. I would like to start looking into these third party Javascript plugins and tags. 

Thank you for your assistance.

Darius Dempsey