Jmol is a Free, Open Source molecule viewer and editor. It is a collaboratively developed visualization and measurement tool for chemical scientists. Jmol is an active project, and there are new features being added to it on a daily basis. Users are encouraged to modify it to fit their needs and to contribute their changes to the project.
ImLib3D is a C++ library and visualization system for 3D (volumetric) image processing. It contains most basic image processing algorithms, as well as some more sophisticated ones. Its images are STL-compliant templated containers. It inculdes a viewer that features multiplanar views, interactive image processing, animations, vector field views, and 3D (OpenGL) multiplanar. Its main application is medical image processing.
The OpenVL library is a framework for working with 3D volumetric datasets. It provides a standard and uniform API to volumetric data access, storage, and processing. It is designed and built to be fast, extensible, flexible, and easy to use. The library is completely open-sourced and encourages contribution. This library is an ideal choice if you want to write applications that deal with 3D volumes.
GeneX Va is a gene expression database supporting storage and analysis of Affymetrix GeneChip technology. It is designed to serve as a secure repository and archive for many researchers' data. It is typically expected to be installed as part of a microarray center; the software is compact enough to install for a single department or even a single user. It includes an Analysis Tree package which includes an ever-expanding set of analytical tools, and has plug-in architecture allowing easy expansion. The "Va" in the name stands for the University of Virginia version, which is a total rewrite of what was originally NCGR's GeneX.
Devices for the measurement of signals use different data formats to store the data on disk. libRASCH provides a common application programming interface to access such signals, regardless of which storage format is used. Additionally, it provides support for processing (e.g. detects beats in an ECG) and viewing the signals. This functionality and the access to the various file formats is realized with plugins.