Want to know more about Tumml founders Julie & Clara? Check out their Q&A on CNN Money. Also, it's Giving Tuesday! Tumml is a nonprofit supported by donations from nice people like you, so please consider donating this holiday season. 

In other news, Tumml and The Blackstone Charitable Foundation hosted The Placemakers: A Conversation about the Entrepreneurs Shaping our Cities in November. It was a huge success, thanks to our sponsors and attendees! Check out some photos here.  

And we've got exciting updates from many of our Tumml alums. Congrats to Chariot for being featured in TechCrunch as the "Last Bus Startup Standing" and to SPROKIT for placing second in the Mobileys "Mobile Future" competition. Also, HandUp was featured in StuffTV's 25 Most Exciting Ideas in Tech

Finally, we've got to send a special shoutout to Rickshaw Bagworks for providing messenger bags for Tumml and our entrepreneurs. We greatly appreciate the support! And for the entrepreneurs out there, dotTECH Domains is offering free domains for startups (use coupon code "TECHOFFER" - valid until Dec 15).

You can read more updates from Tumml here, as well as news stories we're following. For example, startup Improbable has launched SpatialOS, an operating system for simulated and virtual cities.