Probably a good place to start:<p><a href="https:&#x2F;&#x2F;github.com&#x2F;integrations" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;integrations</a><p>It&#x27;s an incredibly sparse list though, given GitHub&#x27;s popularity.  Compare this Atlassian&#x27;s marketplace<p><a href="https:&#x2F;&#x2F;marketplace.atlassian.com&#x2F;plugins&#x2F;app&#x2F;bitbucket&#x2F;popular" rel="nofollow">https:&#x2F;&#x2F;marketplace.atlassian.com&#x2F;plugins&#x2F;app&#x2F;bitbucket&#x2F;popu...</a><p>which seems to include everybody, both big and small.