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It depends, if you have GPU, primegrid and GPUGRID are good ones.
For CPU, asteroids, world community Grid and NFS works well

btw, If you are just starting now and you don't have any GRIDCOIN in your wallet, try Pool-crunching instead of SOLO-crunching.
https://www.gridcoin.us/Guides/pool.htm

how much do you earn per day btw?

it depends but, usually 4-7 GRC a day... I have only two computers crunching and not 24h, only when they are switched on.

Takes time to get a good Magnitude