Scout - Scout ♥ monoliths.
Vaccine Hunter - Find soon-to-expire COVID-19 vaccines, using local groups
Covid Travel Planner by Headout - Track COVID-19 travel restrictions around the globe
Vaccination Standby List - The standby list for leftover doses of COVID vaccine
Toodle - Travel planner that parses content for you
CareSend - In-home COVID-19 vaccination. Sign up yourself and friends.