When developing ActiveGate Extensions, there are some important references on Dynatrace's site. There are also some users that have contributed some of their Extensions publicly, and I have seen them referenced at times in the Community. Given that I have collected some links, I'm posting them below. I have not tested most of them, so of course use them at your own discretion. Most of the names are self-explanatory. And, of course, if you know more, please post them below.