Computed flux distributions can be graphically analyzed in Cytoscape with the plugin FluxViz which can be downloaded from SourceForge page of FluxViz. It can also be obtained from the internal plugin structure of cytoscape.
FASIMU can neatly work together with the CellNetAnalyzer. It uses the same internal data format, so the metabolic model which is analyzed with in CellNetAnalyzer can be put directly in FASIMU, and the flux distributions computed (prepared with allout2valfiles) can be read in with the "Load scenario function" in CellNetAnalyzer.
If you found a bug in FASIMU, please submit it to the Bug tracking.
You may discuss FASIMU in the forum.
Here is the public task manager.
There is a survey site on FASIMU.
Main project page on bioinformatics.org.