How does a Catholic church support itself without Tithe?

Usually, in Protestant churches, the church's income is mostly from tithes and then offerings, and secondarily from any outside sponsors the church may have. I am less informed how the Catholic church raises their funds. I learned from this post that Catholics don't tithe. As a protestant, I wonder how Catholic churches support themselves. How does a Catholic church support itself without the money from Tithe? How generous are Catholics in giving offerings to the church?