The support for touch gestures seems to be limited. What I found:
- There exists a FireFox (Iceweasel) extension Grab and Drag that adds expected behavior (i.e. scrolling) to FireFox.
- Chromium supports touch gestures out of the box.
- There is xstroke that allows detection of hand writing to use this as input method. However, this tools seems to be unmaintained since 2003 and there is no package available in Raspbian.
- There is Touchegg, a Linux multitouch gesture recognizer. Unfortunately, there is also no pre-compiled package available for Raspbian.