I used an Arduino Uno (Rev 3) with a DFR LCD Keypad shield (v1.0) since it is easy to use. You can use any Arduino compatible LCD panel/shield here but will need to tweak the default Arduino Sketch ...

The 1Sheeld, a single shield that lets you replace all of those other shields with your smartphone. Today, that project went up on Kickstarter and almost immediately destroyed its fundraising goal.