You may try to look for faucets. It may ask certain task for you to do for a small amount of cryptocurrency. Another are airdrops. Again you need to do here minor task like filling up forms for certain requirements and then you get your free cryptocurrrencies. Both doesn't give as much as bounties though but are good sources of free tokens.
Faucets are not worth doing to be honest. They are just waste of time. You just collect dusts which won't even cover your transaction fees. You are better off doing something more efficient and time worthy things. Or just buy the coins and hold it till you are satisfied with the profit.