SQLite is quite possibly one of the most useful pieces of software ever created. It's small, relatively fast, and unbelivably solid. It's up there with bash, curl, grep, emacs, and nano: tools that are just so good at their job that we don't even notice how amazing they are.

I mean, really. SQLite is remarkable, impressive, and used everywhere, and we never talk about it. Emacs is a remarkably impressive piece of engineering, bash is the world's default shell for a reason, Nano is the newbie's text edior, and, well, just imagine for a second what would happen if grep or curl stopped working.