Styluses and pixel rulers for designers.
With Li Xiang drawing constantly in FiftyThree's Paper app to design our new house, I picked up the FiftyThree Pencil stylus. Launched in November 2013, the Pencil is built to pair with Paper, working far better than an ordinary stylus.
I bought the Pixel Ruler from UI Stencils for US$29 plus shipping to Singapore. A handy tool for responsive screen sketching, it's a heavy-duty stainless steel ruler with pixel increments and markers for mobile, tablet, and widescreen sizes.