Valve founder Gabe Newell isn't just interested in gaming technology, like living room computers and virtual reality -- he also appreciates the science behind a well-prepared meal, too. The legendary game developer has poured money into ChefSteps to help them make Joule, a smart immersion circulator for sous vide cooking. Instead of fiddling with buttons on the wand to heat your water bath, you use a mobile app to set and monitor temperatures. It has presets for particular food types, and you can even have it change temperatures at different times -- if one guest prefers rare steak while another likes it well-done, you can make that happen. The hardware is small yet powerful, too, packing a 1100W heater into an 11-inch cylinder that can fit into your kitchen drawers.