non-wca events

Interested in what people's favorite non-wca puzzles are. This isn't a comprehensive list but I tried to include the most popular puzzles listed on TC/SCS. If you choose 'other' let us know what it is!

Since quarantine has prevented WCA sanctioned competitions I've been thinking about some new non-WCA challenges/events. Given the unique circumstances it seems to me that now would be an excellent time to be exploring the viability/interest in nontraditional events (e.g. Kiliminx, Master...