Pluginval is an open-source, cross-platform plugin validator and tester application. It is designed to be used by both plugin and host developers to ensure stability and compatibility between plugins and hosts. It's recently had a bunch of updates and improvements.
ValidateMyPlugin.com is a brand new web service based around pluginval validations that lets users really easily validate plugins without having to download or install any tools.
I want to answer questions that other people might have and talk about how to choose a perfect designer for a project