sentence: oz now also distributed since 1.4.0 pipeline pilot prograph pure data pythonect quartz composer - designed by apple ; used for graphic animations and effects sac single assignment c scala ( with a library ) signal ( a dataflow-oriented synchronous language enabling multi-clock specifications ) simulink simpl sisal - a visual programming environment focused on industrial vision ( open source ) swarm system verilog tersus - visual programming platform ( open source ) verilog vhdl vignette 's vbis language for business processes integration vvvv vsxu widget workshop , a '' game '' designed for children which is technically a simplified dataflow programming language .