Sometimes ago I discovered a fantastic navigation software (born and very used for gliders, but good for us too) It's name is LK8000, open source, fully configurable. It has replaced anything else in my cockpit (I can define, finally, all my airspaces, waypoints and so on as I like)
It can be loaded on any Windows CE PNA (or mini PC or tablet with Windows). No Android or iOS.
No advertising, no hidden tricks.
You can find it here: http://www.lk8000.it
Youtube tutorial channel: http://www.youtube.com/user/LK8000TEAM
Some screen capture:

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The team is searching volounteers too to develop furtherly the GA section. Anyone available here?