Was in the progress of training for a half marathon so i usually log somewhere between 7-10k running daily, long run once a week, with HIIT thrown in once a twice a week.
Work with weights 2-3 times a week

I recently sprained my right ankle pretty badly and im unable to continue with my usual workouts.. so for now no running, no lunges, no heavy squats
Id like to try keep my fitness up, any recommendations on what i can do?

I only have access to free weights ..

Would appreciate any advice, im really missing my gym fixes

Focus on other body parts? Try doing things seated, will put less stress on the injured ankle too. My advice would be to lay off any training relating to legs until it heals.

Hope you get better soon.

How about single leg exercise?
Step ups, pistols, etc...

My suggestion towards injuries are generally, static contraction with minimal load. Stretching and ensuring the joint rides through the full range of motion that it could possibly go without hurting. Mobilitywod.

Google that term and you'll find some stuff that'd probably be useful.