Based on our record, Flowchart.js seems to be more popular. It has been mentiond 1 time 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.
What problems do you have with all the existing options (just a couple links I picked from a google search)? Source: about 3 years ago
Code2Flow - An easy solution to create product flows.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
Chart Mage - Generate sequence diagrams and flowcharts at lightning speed.
DIagrams Through Ascii Art - Java command-line tool to convert ASCII diagrams to bitmaps.
asciiflow - Infinite ASCII diagrams, save to Google Drive, resize, freeform draw, and export straight to text/html.
Graphviz - Graphviz is open source graph visualization software. It has several main graph layout programs.