Related work

Visual programming languages for Haskell or Haskell-like languages

• John Reekie's Visual Haskell
• Viskell
• FunBlocks
• The Gem Cutter – A Graphical Tool for Creating Functions in the Strongly-typed Lazy Functional Language CAL (pdf)
• Vital (archive.org link)
• Joel Kelso's thesis: A Visual Programming Environment for Functional Languages (pdf)

Other functional visual programming languages

• Luna
• Sifflet
• Autodesk 3ds Max Creation Graph
• Skov

Structural editors

• Lamdu
• Unison

Links, papers, and resources

• Instant playful access to serious programming for non-programmers with a visual functional programming language (pdf)
• The “Physics” of Notations: Towards a Scientific Basis for Constructing Visual Notations in Software Engineering (pdf)
• I know what you did last summer: an investigation of how developers spend their time (pdf) (papers that cite it)
• Evidence-based programming language design