Strava - The #1 app for runners and cyclists
Fitso - Your personal coach for fitness, running & weight loss/gain
Komoot - Plan Your Perfect Hiking, Mountain Biking or Road Biking Adventure
Salut - Find and support free virtual fitness classes and trainers
Trailforks - World's largest trail database and management system for trail associations, builders and riders. Started for mountain biking trails, now including all trail uses.
Runtastic - Runtastic offers a series of fitness apps that can be used to track your running, walking, hiking, and cycling, as well as many other fitness routines. Read more about Runtastic.