Got an idea for an app or small game, but don't think you have the coding chops to pull it off? CodeDay invites high school and college students to form teams and spend 24 hours making something you might not have thought possible. Sat.-Sun., Feb. 15-16. $20.
HubAustin Coworking, 706 W. Ben White Blvd. Ste. 230-B
Get out your corsets and chain-mail and join the fun and fantasy in the medieval village with scads of performances each day, plus food, shopping, live music, and unparalleled people watching. Weekends, Feb. 8-March 30, 10am-dusk. $20 ($10, kids).
Habitat for Humanity now offers free, once-a-month tours of recent and past home-building sites. See how much they've accomplished, and find out what's yet to be done. Call or e-mail to reserve a seat.