Over the last couple of years( or maybe less ) a number of different mobile application development frameworks have come up that promise you the ability to create cross platform( in some cases ) mobile applications without native device SDK programming. Some of these are OpenPlug, Redfoundry, Appcelerator, PhoneGAP, RhoMobile , Ansca-Corona
This list is steadily becoming bigger so it’s a bit of a challenge to know which are the good ones from the not so good and bad ones out there. Anyone in this group has any good/bad/ugly experience with any of these these ? If you've used any of these , are these really good enough to build real world applications ?