Based on our record, FreeMind should be more popular than Facebook Design Resources. It has been mentiond 3 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.
Spotify isn't doing anything unique here, and it's not really a marketing campaign to explain away their UI. It's more of a showcase for hiring professionals, developers/designers/etc. Facebook has a similar one -> https://design.facebook.com/. Source: almost 3 years ago
Also, read anything published by Design @ Facebook. Source: over 3 years ago
Freemind and Freeplane are two mind mapping applications that have been around for years. Source: over 1 year ago
Download: https://sourceforge.net/projects/freemind/. Source: about 3 years ago
Some others you might be interested in are yEd, or Freemind or other mind-mapping software. Possibly see whether BPMN is relevant. Source: about 3 years ago
Designer Mill - Collection of Best Free Design Resources
Xmind - Xmind is a brainstorming and mind mapping application.
Interfacer - Collection of more than 200+ free design resources
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Freebiesbug - Collection of the best free web design resources.
TheBrain - TheBrain: The Ultimate Digital Memory