The Ready State Virtual Mobility Coach is like having a virtual Kelly Starrett in your pocket.
One option for gear free mobilizations are the 7 that are emailed when you join TRS.
They are also located on the TRS App in the bonus content.
The app is free use your log in for the site to log into the app.
If you search the archive you may find more gear free mobilizations.
A baseball or softball could be used in place of a lacrosse ball.
A kids playground ball can be used for ab/core doses.
If you have an old bike tire that can be used as a band.
A second solid option is the Functional Yoga For Athletics Course
This is an excellent course the majority if not all requires no equipment.
From the Blog Kelly has listed a couple routines.
My 10 Minute Morning Mobility Routine
There is a Breathing Practice Spin Up & Lower Body Spin Up