Thank you, that&#x27;s very encouraging!<p>The feature was not accidental. I always wanted to expand the possibilities of Filter Forge&#x27;s nodal language, but until I met Haskell I didn&#x27;t know how to do that. And now, after trying Haskell, it&#x27;s simply impossible for me to think in terms of non-general, domain specific visual languages. The Haskell paradigm lends itself very well to a visual syntax, but there&#x27;s a lot of problems to be solved, and that will be an excellent challenge for me in the coming years.<p>Despite looking complete, it&#x27;s really, really far from that. There are serious conceptual problems that remain unresolved yet. We do have a visual tool for constructing and typechecking programs, but it’s not yet ready for any release, even an as-is alpha. Actually, the screenshots I posted are my Excel mockups: <a href="http:&#x2F;&#x2F;i.imgur.com&#x2F;WYeLJJr.png" rel="nofollow">http:&#x2F;&#x2F;i.imgur.com&#x2F;WYeLJJr.png</a><p>As for the open-source &#x2F; closed source, I spent some time thinking about that, and discussed the idea with the team, but we’re not ready to make the decision yet.<p>On one hand, I&#x27;d be immensely pleased if our research on visual syntax for functional languages could be useful to the wide world. Functional programming really deserves wider adoption, and if our research can help that, I’d be very proud. Also, open-sourcing this may bring a lot of benefits to our commercial product, because it will allow us to access the global talent pool of functional programmers, who, collectively, have vastly more expertise than all our developers combined. I also think that many of these programmers are in academia, and would welcome a visual tool that could help them teach functional programming to their students.<p>On the other hand, we, as a company, have absolutely no experience in starting and maintaining open-source projects, and we have no idea how to do that properly, and what resources will it require from us. I’ll have to read up on that.