I remember a somewhat prominent dev in the DC area putting on Twitter around 2012 or so something like "I do plenty of open source coding and I don't put a fucking license on it" and it stuck with me for all these years that it was a weird stance to take.
My favorite which is also up to date is the ClickHouse playground.
For example:
SELECT * FROM hackernews_history ORDER BY time DESC LIMIT 10;
https://gh-api.clickhouse.tech/play?user=play#U0VMRUNUICogRl...I subscribe to this issue to keep up with updates:
https://github.com/ClickHouse/ClickHouse/issues/29693#issuec...
And ofc, for those that don't know, the official API https://github.com/HackerNews/API