Android is a software stack for mobile devices that includes an operating system, middleware and key applications.

The Android SDK provides the tools and APIs necessary to begin developing applications on the Android platform using the Java programming language.

Some of its features are :

Application framework enabling reuse and replacement of components
Integrated browser based on the open source WebKit engine
Optimized graphics powered by a custom 2D graphics library; 3D graphics based on the OpenGL ES 1.0 specification (hardware acceleration optional)

Yes its true Instagram for Android has launched.
Instagram for Android is now available for practically every Android smartphone n the Google Play Store as a free download.

Instagram for Android is more than just a photography app with artistic filters, it’s also a huge social network with over 27 million users. The Instagram community will grow today as the millions of Android users can now download the popular app.

Instagram for Android doesn’t have the same issues Temple Run did at launch, with support for any Android phone running Android 2.2 or higher.

One of the most popular photography applications for the iPhone has quickly become one of the most popular Android apps. Instagram for Android surpassed 1 million downloads less than 24 hours after its release on the Google Play marketplace on Tuesday.

The Android application opened its pre-registration last week, attracting more than 430,000 users. When the service launched it reportedly saw 2,000 sign-ups per minute, nearly crashing the company’s servers. The popular app allows users to capture photos and edit them using a number of filters that give images a unique retro look.