Moran Eye Center Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported Yes University of Utah NITRC Viking family of Viewing/Annotation/Analysis tools for Connectomics Yes Viking is a multi-user modular viewing and annotation system which functions with any type of stacked 2D imagery registered into a 3D volume. Originally designed for transmission electron microscopy connectome data Viking has been used for confocal, bright field, and OCT images. Viking provides multi-user concurrent annotation of data sets using a variety of 1D or 2D shapes, including arbitrary polygons. Annotations are stored in a spatial database. The largest current database has well over a million annotations. A paper describing Viking is here: http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2818.2010.03402.x/abstract Collaborating labs host images, typically registered with the Nornir tools, locally. Annotations are either stored on the Viking servers or optionally labs deploy local back-end servers with assistance from the developer. Viking family of Viewing/Annotation/Analysis tools for Connectomics Optical Imaging, Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported, Microscopy http://www.nitrc.org/projects/viking_viewer/