Despite being made of thin aluminum, this simple Rain Design stand is sturdy. Type away without worrying about it buckling, and take it from your office to your living room or a coffee shop. It folds up to just 9.5 x 6 inches, so it fits into any bag you'd also put a laptop in. It also weighs less than a pound. It's a set height, raising a laptop about 5 inches at an angle. My colleague now has two of these, so he doesn't have to worry about toting it back and forth between home and the office.
The mBar Pro Plus holds 9.7-inch (and up!) iPads if placed horizontally. There's also the mBar ($25) stand, which raises a laptop 3 inches and doesn't fold up, and mBar Pro ($55), which raises it the same amount but folds.
★ More from Rain Design: This brand offers a ton of stands for tablets and iMacs, including this robot-esque iGo stand. I tried and liked the mStand 360 ($60), which swivels on a lazy Susan–like disc. I also liked the iLevel ($65), which has a slider for easily adjusting the height while your laptop is on it. All are designed with Apple products in mind, but most should work with other laptops too; just be sure to check the measurements and description.