FareUpThere - Earn rewards for your feedback on flights
Vaccine Hunter - Find soon-to-expire COVID-19 vaccines, using local groups
RoadGoat - Map where you've traveled. Get matched with best places to go next!
Vaccination Standby List - The standby list for leftover doses of COVID vaccine
Skyscanner - Skyscanner.com compares over 1000 airlines to find you the cheapest airfares, fast.
CareSend - In-home COVID-19 vaccination. Sign up yourself and friends.