When comparing yEd vs SimpleMind, the Slant community recommends SimpleMind for most people. In the question“What are the best flowchart / diagram softwares?” SimpleMind is ranked 7th while yEd is ranked 8th.
Ranked in these QuestionsQuestion Ranking
Pro Completely free
Runs on Windows, Linux and Mac OSX. There also is a Web application.
Pro Automatic Layout
With automatic layout you get great looking diagrams with very little effort. yEd has the most versatile and most complete collection of automatic layout algorithms.
Pro Proficient editing tools
Con Not free-as-in-freedom
Not released under an open-source license.