This is a remix of the multiple device charging stand by wittless (http://www.thingiverse.com/thing:1471349).
I made the slots wider to hold phones and tablets in cases. The slots are (from front to back) 1.5cm, 1.5cm, 1.7cm, 2.5cm and 2.5cm. They have fairly tight tolerances for standard cases, and probably wouldn't hold an Otterbox in the front slots, but the back ones should.
Taller tablets in the back slots could still tip this (My Note pro 12.2 in the case tips it over), despite the taller supports and the addition of feet in the back, but putting just one phone in the front slots will prevent this, as does moving the tablet to the next 2.5cm slot up.
Modeled in Blender, sliced in Cura, printed on a Monoprice Maker Select (modified) at 210 degrees (with extreme cooling - temp readout hovered around 190), 60 degree heated glass bed with hairspray adhesion in black eSun PLA+. Layer thickness was .25 at a print speed of 40mm, 35% infill - took roughly 14 hours (wanted it to look good in my living room).
I'm posting the .blend file (you can download blender at www.blender.org) for anyone who wants to mod this. The feet could be a little longer in the back, but doing that might make it too big for a 200x200 print bed.
Thanks to wittless (http://www.thingiverse.com/wittless/about) for the initial design!
Monoprice Maker Select (modified extruder, fan, gear, etc.)
I printed this with 2 brims, but it's not necessary if you're getting good bed adhesion - no warp, no pulling.