This library is just a quick and easy way to get input through keypads.
The library supports keypads with up to 6 columns and up to 5 rows of keys.
There are probably other libraries available that can do exactly the same, but it was so easy to write this so I did not bother to look for any.
Download:
KeyPad.zip (Filesize is 335.53 KiB. Downloaded 11514 times)
A demo showcasing most of the functions is included in the download. This is a multi-platform library that will work with several different development board types.