We just released VTK Designer 2.6 Beta. Some of the interesting new features (on top of the obvious performance improvements because of moving to Qt 4.4 and updating the canvas code etc…) are
0. VTK Designer 2.6 now uses GCF 2
1. You can now add notes to the pipeline
2. You can load UI forms on to the canvas
3. Data files referenced in the pipeline can be relative to the position of the project file.
4. New wrappers.
5. Whole lot of new examples
Million thanks to Ariya for Screenie.