This needs work, but I made this keypad part for Fritzing:
Part file (zipped): Generic_4x4_Keypad.zip
You’ll see these parts described as variations on â€œ4×4 Matrix 16 Keypad Keyboard Module 16 Buttonâ€ on ebay. They’re very simple: if you press a button (say S7), the row pins (R1-4; R2 for S7) and the column pins (C1-C4; C3 for S7) are connected. So pins R2 and C3 are connected when S7 is pressed. You can use the Arduino Keypad library to talk to these, but do remember they use up 8 I/O pins.
It’s not internally routed in Fritzing, and you likely won’t be able to use it for any kind of schematic work, but who uses Fritzing for anything other than pretty pictures?