Not just raw APIs. What I miss the most are tools and frameworks. For example even putting together a basic UI for a simple todo list is a challenge for me to

Not just raw APIs. What I miss the most are tools and frameworks. For example even putting together a basic UI for a simple todo list is a challenge for me to do in HTML. I need to know HTML, CSS, positioning, differences between mobile browsers, platform-specific css tricks, etc. It is really not so simple. On iOS I just drag and drop stuff in Interface Builder and connect outlets and actions. Done. The other thing is standardized frameworks. Everybody hates frameworks but on iOS (and Android) they implement all the hard stuff. Want to show a list with a million items? There is a framework that deals with that. Just fill in the blanks (create table view rows, lookup data) and you are done. In the HTML world not so much. It is all way too low level. Developers either have to start from scratch or use something like jQuery. But all those frameworks are young and inherit the basic problems of the web platform. jQuery Mobile is a good start, but some things really need to become part of a W3C standard and implemented natively for performance in my opionion.