As of July 5th. 2012 the official release of OpendTect v4.4 is available from the download page.
New in the Open Source part
New Installation Manager
With this tool it has become much easier to install and manage the application, and to select only those components you really need / want. Henceforth, OpendTect will inform you when there are updates available and, depending on your own preferences, it may then automatically start-up the installation manager.
Highlights
SEG-Y header manipulation tool
Load cubes from other surveys (sinc interpolation)
Create cubes from 2D data
Create cubes from well logs, along the deviated well tracks.
Attribute that snaps on-the-fly to an event and returns the amplitude
Four new default attributes for faults and AVO
The variogram tool is now anisotropic and well specific
Tool for bulk modification of well logs (filter, clip, etc.)
Log creation mathematics extended by the Rock Physics library
Checkshot editor
3D Pre-stack event visualization
Multi-gather pre-stack viewer
Improved manual classification tool in crossplot module
Basic layer modelling (generation of properties, synthetics, and extraction of attributes)