FitOn Free Fitness Workouts
FitOn offers a wide variety of workouts for all skill levels for free. With no need for additional equipment. It has a wide variety of plans and you can choose among many workouts including very short ones.
Go to FitOn, answer a few questions about yourself and get access to a selection of training videos for your fitness level and goal. It is simple as that and you will be all set in 1 minute, no catch.
To give you an idea, check out screenshots of Full Power Body HIIT training by Orangetheory:
Get premium features (personalized meal plans, offline downloads, party video calls, premium music, real-time heart rate) if you want to get results faster.