Historically, ImageJ 1.x was funded internally by the Research Services branch of the National Institutes of Health. It is developed by Wayne Rasband, who is now retired, and continues his work on ImageJ1 as an NIH special volunteer.
ImageJ2 was initially funded from 2010 through 2012 by the National Institute of General Medical Sciences (NIGMS) through the American Recovery and Reinvestment Act of 2009 NIH Research and Research Infrastructure "Grand Opportunities" Grant, "Hardening" of Biomedical Informatics/Computing Software for Robustness and Dissemination (Ref: RC2 GM092519-01). For more information on the grant call, see the listing on the NIGMS Grand Opportunity Areas page. See also the original ImageJ2 grant proposal from 2009.
In recent years, ImageJ2 development has been funded by several sources, including a Wellcome Trust Strategic Award (Ref: 095931) for the OMERO project, and substantial development effort at the University of Konstanz, University of Wisconsin-Madison and elsewhere. The ImageJ2 project as a whole is maintained by Curtis Rueden of UW-Madison LOCI.
SCIFIO's development is now funded indirectly by various institutions as part of their respective research and development goals. SCIFIO as a whole is organized and maintained as part of the ImageJ2 effort by Curtis Rueden of UW-Madison LOCI.
The ImgLib2 project was developed by Stephan Saalfeld, Stephan Preibisch and Tobias Pietzsch of the Tomancak lab at MPI-CBG. In recent years, ImgLib2 is funded indirectly by the various involved software efforts, including the Tomancak and Saalfeld labs as well as UW-Madison LOCI. The ImgLib2 project as a whole is organized and maintained by Tobias Pietzsch of MPI-CBG, Stephan Saalfeld of Janelia Research Campus, and Curtis Rueden of UW-Madison LOCI.
Core SciJava libraries are funded indirectly by the various involved software efforts, including ImageJ2, KNIME, OMERO and CellProfiler. The SciJava project as a whole is organized and maintained by Curtis Rueden of UW-Madison LOCI.
Fiji development is funded indirectly by various institutions as part of their respective research and development goals. Fiji as a whole is organized and maintained as part of the ImageJ2 effort by Curtis Rueden of UW-Madison LOCI.
The Dresden Analysis-of-Images Suite (DAIS) is a partner project of CIBI in the German Network for Bioinformatics Infrastructure (de.NBI). The Fiji community is actively working towards tight integration with the KNIME workflow engine, which is maintained and developed by the de.NBI center CIBI. DAIS has a strong focus on further strengthening interoperability and integration of Fiji and KNIME, as well as bringing together their respective developer communities.