What exercises are there that require no fitness equipment, weights or dumbbells to exercise my chest muscles?
the reason i'm asking is because everytime i do a pushup my elbows crack and if i keep doing them it'll make em worse so please do you know any besides pushups?

Lay on your back and hold two really heavy textbooks, spread your arms to your sides, and life them straight up above your chest, meeting high above you- keep your arms straight the whole time, bring them out to your sides again. Repeat