VolViewer is an application for the interactive visualisation of biological data. The application is written in C++ using OpenGL and Qt. It is fully cross platform.

Features:

Real-time volume rendering using an optimized 3D texture algorithm.
Interactive transfer functions to independelty adjust opacity and luminance for up to three data channels.
Real-time thresholding, brightness and contrast operators.
On-the-fly gradient computation for local illumination.
Iso-surface computation.
Section viewing in any orientation / position.
Real-time volume clipping.
3D measurements.

Requirements:

Nvidia Geforce 8 and above.