Based on our record, NoFlo seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
My work on Flow-Based Programming (https://noflojs.org/) got me a job about ten years ago. The startup founder had seen a talk I gave about it and got in touch. NoFlo ended up being used extensively in that company. - Source: Hacker News / 7 months ago
Well you can build independent services for you project and use some OOB solutions for each service, but you still will need to write some code to properly call your APIs and utilize the result. There is some visual blocks-based project: Https://noflojs.org/. Source: over 2 years ago
draw.io - Online diagramming application
Node-RED - Node-RED is a programming tool for wiring together hardware devices, APIs and online services in new and interesting ways.
LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
232key - Transforms data received via RS-232 into keystrokes. Make your serial device talk to any program!
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
WinWedge - Data collection software for serial devices, including meters, balances, scales or any RS232...