ec4e - similar project (only for Generic Editor)
I would like just say you that I'm developping a new plugin for editorconfig which works only with GenericEditor https://github.com/angelozerr/ec4e
This plugins apply all properties (trim trailing whitespace, charset encoding, indentation etc) but only for a given instance of editor by using a custom IPreferenceStore instead of modifying the workspace eclipse preferences.
It works only with GenericEditor (JDT Editor, WTP XML Editor doesn't works very good because there are not based on GenericEditor).
https://github.com/angelozerr/ec4e is based on several technologies:
- apply the all properties of editorconfig with GenericEditor
- provides an editorconfig editor based on GenericEditor, tm4e for syntax coloration

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provides an editorconfig editor based on https://github.com/angelozerr/ec4j instead using standard editorconfig-core-java to parse editorconfig editor. This parser is able to manage location for section, option, etc and provides services for any Java IDE (completion, hover, validation, etc)
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provides Codelens for section pattern:

@ncjones hope you will understand my choice, I don't want to have trouble with you. It was a pleasure to work with you!
Very cool! Thank you for your contribution!