Canonical wants ntpd-rs, a Rust rewrite of NTP (Network Time Protocol), to become Ubuntu's default time sync client. To help get there, Canonical has

Licence is MIT / Apache, of course.

EDIT: of course the relicensing is the problem here. Alas we’re in an all-time low interest in Free and Open Source politics, ideologies, and organization so the Big Evil Corpos continue to do their thing, one cog per time.