Sites that I think are interesting. Vary between "actually useful" to "nifty timewasters."
Sit - An incredibly minimal timer that asks you to do... nothing. Comes with a nifty blogpost regarding the attention economy.
Nestflix - A fake streaming service for shows within shows; fake shows that were seen inside of actual shows, often as gags.
Untranslatable - A non-english equivalent for Urban Dictionary.
Improbable Island - The world's [worst/best] text adventure. Long, confusing, and been in constant development since the dial-up days.
CloudHiker - A site that lets you discover other cool sites, sorted by categories.