It may be nice to have a prebuilt library of action collections so you can quickly drop into your project. Things like dropping in an common error handler/error log reporting block into your code or even simple things like a simple switch/case or ADO iterator snippet could save quite a bit of time.
Having some standard, pre built system snippets are obvious and allowing the user to add/edit their own, but it may be useful to have a shared online library that customers can contribute to. It certainly would be nice to open the "insert snippet" window and view all the "local" snippets grouped by type/definition and also be able to query the online library of shared snippets to add to your local library...
Just a thought, TJ.