1.PipedreamHQ / pipedreamConnect APIs, remarkably fast. Free for developers.eventsourcingevent-sourcingautomationworkflowworkflowsapis+13 moreJavaScriptOther license12K total5.9K forks+199 starsfrom 11,568 · score 5.30
2.FlowFuse / flowfuseConnect, Collect, Build, and Scale with FlowFuselow-codenode-redflow-based-programminglow-code-developmentlow-code-development-platformno-code+1 moreJavaScriptOther license400 total90 forks+7 starsfrom 393 · score 2.08