I was searching yesterday for informal fonts for my net-book computer -- which runs Linux. One can download a very nice variety with the Linux Synaptic Package Manager. But beyond that, one can download (free) any one of "zillions" of TrueType fonts off the Internet. I myself download them, extract them, then install them manually. So I claim superuser privileges at the Terminal, then I move the extracted .ttf files to where one finds the rest of the .ttf files, which on my computer is in /usr/share/fonts. Then one reboots the computer. Here are some example fonts (pictured). They are "tame" compared to some.