Dolphin Browser is a proprietary mobile browser for Android and iOS developed by Mobotap.

Dolphin Browser was one of the first alternative browsers for the Android platform that introduced support for multi-touch gestures.

Since its initial release for Android, Dolphin has received generally positive reviews from both the media and the public. Both the Android and iOS versions have been particularly lauded for their gesture-based functionality, speed and ease-of-use.

Both iOS and Android versions are free without advertising. There is an advanced version called Dolphin Browser HD for Android 2.0 or later. Dolphin HD uses the Webkit engine and the native platform rendering capabilities, which allows for a small disk footprint. It is capable of running Adobe Flash on Android, but it can have problems with video streaming.

Source: Wikipedia