I want to develop a location-based social network to be accessed from PCs and Mobile Devices. For Mobile Devices I want to deliver a native-looking app to access the Network.For WP7,iOS and Android. But I don't want to write truly native apps so that I dont have to re-write the App for each Platformm, and second because the App is all web based. So I better be using web technologies. The question is, for these Client Apps, what are the Frameworks or Libraries available to use?
I would go for PhoneGap in your case. Write once deliver everywhere.It also let you easily use other libraries and Framworks like Secha.
Other options are Titanium AppAccelerator, MoSync.