When it comes to tracking websites, there are open source analytics apps like Piwik, OWA or ChiliStats. But, for mobile, it is hard to find a good one.
Countly is a modern, real-time and open source mobile analytics application which can collect data from mobile phones and visualize that info for analyzing mobile app usage + end-user behaviour.
It is formed of 3 parts: the Countly server + frontend, iOS SDK and Android SDK.
With an event-driven system, almost every action can be tracked including in-app purchases, when a user closes the app, ad-click behavior, etc.
All these details are displayed in the slick interface of Countly. And, you are not limited to racking a single app. The same interface enables adding any number of apps.
Requirements: MongoDB, Node.js and Nginx (on a Linux machine)
ViniSketch Designer is a free application –for Mac OSX– for designing and creating mobile applications using native and web technologies.
It comes with feature-rich visual editors for designing the GUI + dataflow and code editors for keeping the development under control.
The engine of the app has support for multiple platforms and you can managing your mobile app for each device you're targeting.
ViniSketch Designer is currently compatible for building iOS + Android apps, however, compatibility for other popular platforms are under development.
It can auto-generate Phonegap projects and there is a built-in HTML5 simulator + debug tools based on WebKit WebInspector.
Requirements: Mac OS X 10.5 Leopard+
IconShock, the icon design company behind many popular icon sets, is now sharing a huge set for Android designers/developers.
Android Icons Set consists of 15,000 items styled with the Android's design guidelines and probably the most complete set for the platform.
There are 600 completely unique items while the rest are the addons (like "add file, edit file, delete file") which is great to have the necessary action icons when needed.
It is free to be used in personal projects (free version includes 3 sizes: 24*24px, 32*32px, 48*48px).
P.S. They also have a similar iPhone icons set.
jQuery Rewritten, Ground-Up, for Mobile HTML5 on iOS and Android devices.
This is how jQ.Mobi defines itself and gives a good insight on what it is.
Compared to jQuery Mobile (24kb), it is much smaller in size with only 3.5kb (both minified and gzipped) and covers most features with the same syntax.
When it comes to speed, jQ.Mobi is impressive there as well and mentioned to be 3x faster on Android and 2.2x faster on iOS.
The framework also has a UI library (again smaller in size) and includes plugins for mobile interactions and interfaces
Requirements: No Requirements
Compatibility: WebKit Browsers
There are several awesome and feature-rich frameworks out there for building mobile web apps which can handle almost any scenario.
For complicated apps, they are usually the best option to go with. However, if you are building a simpler app that requires the most standard UI features, Zoey can be for you.
It is a HTML5-CSS3-powered framework for creating mobile apps, built on top of Zepto.js and weights only 6kb (gzipped).
Zoey has the UI components like navigation, lists, buttons, control groups, forms and grids.
The framework is compatible with iOS + Android and comes with an app skeleton that covers all the features.
Compatibility: All Modern Browsers (iOS 4.2 & Android 2.2 tested)