In terms of monentary cost, many useful things are. Free software also used to be less of a crapshoot (is it *really* safe, a virus/trojan, adware, or nagware)?
Apache: Free
OpenOffice/LibreOffice: Free
Java: Free
There were/are also a lot of free utilities that - while not pretty - were basically in the realm of "hey I made this to solve X for myself and thought somebody else might find it useful."
There may be some learning involved to *use* the product, and certainly many FOSS solutions involve community-provided updates, but in terms of personal cost it's free for me.