Quantitative Biology Tool is a SBML-compliant application on the NetBeans Platform. It supports both qualitative and quantitative modeling of biological systems. It is designed to support "the iterative nature of the scientific method, which alternates between experimentation and model refinement. Researchers may utilize either hypothesis-driven or data-driven approaches with QBT." QBT is developed by SemanticBits in collaboration with the National Heart, Lung, and Blood Institute (NHLBI) and is being adopted there.
What makes the application unique? According to this presentation, the following:
  • Primarily a tool for non-computational biologists to construct, annotate and evaluate models.
  • Designed to support projects with high-throughput data sets (microarrays, sequencing, GWAS, proteomics).
  • Intelligent tools to access Ensembl (and other) annotation data.
  • Workgroup server.API to add new data types and helper applications.
Some screenshots:

The screenshots come from the QBT site.
I imagine that knowing about the above application could be of particular usefulness to developers of OTHER biology-related applications on the NetBeans Platform, such as Instant JChem and ChipInspector.