Freefall Baltimore is on and runs the duration of October. It's an excellent opportunity to check out the local art scene's diverse offerings, and it's all free. There's something for everyone. Brainiacs will swoon getting to hear Witold Rybczynski (Oct 22) and Malcolm Gladwell (Oct 6) speak, for free. Jazz heads can see Carl Grubbs at the Pratt (Oct 8), for free. There are many events for the whole family, and they're all free. You can peruse the impressive event listings here.