FlowCanvas (http://www.nongnu.org/om-synth/flowcanvas.html) is a canvas widget for dataflow systems. It consists of a Gtkmm widget containing movable modules and ports which can be connected in various ways. This is a CVS version; there are no releases available, sorry.
Created attachment 89555 [details] dev-cpp/flowcanvas/flowcanvas-9999.ebuild (CVS version) flowcanvas-CVS ebuild
added 0.4.0 as x11-libs/flowcanvas