A simple 3D-printed and lasercut enclosure for a Raspberry Pi 2 (should also work with Model B+, but not tested). It looks somewhat like an ice cream sandwich when printed in white PLA, combined with Padauk wood covers.
The "Tall" version adds extra height for an extension board (an XBee adapter in my case.)
The included Raspberry Pi model is from https://www.thingiverse.com/thing:697403
The middle of the sandwich as shown in the pictures was printed in white PLA, 0.2mm layer height, 30% infill. The screw holes in the thicker (top) part are tapped M3; holes in the bottom part and in wooden covers are drilled for clearance (~3.2mm). The enclosure is held together with some ~10-14mm long M3 screws.
The wooden covers are laser-cut from 1/8" Padauk board.