Passing on this huge announcement from FltPlan.com. They are now offering free geo-referenced approach plates and taxi diagrams! I have used FltPlan Go in the past, and while they have some usability work to go, at this point it could be considered a viable replacement for Foreflight.
Geo-Referenced Approach Charts Free on FltPlan Go
In addition to our Geo-Referenced Taxi Charts, FltPlan Go now has Geo-Referenced Approach Charts for the entire U.S.
Our apps and our digital charts are completely free.
To download FltPlan Go, go to Apple's iTunes Store.