My wife sends me shopping lists via text message. One day I finally sat down and made an app to deal with it better than iOS Notes.app.
Use it here: http://ryanflorence.com/list/
It is a single html file and may it ever be so. All JavaScript and CSS is inlined and its hilariously wonderful. If you want to add some functionality please create it from scratch, no libraries.
(c) 2013 Ryan Florence
Use of this software is restricted to the hosting on ryanflorence.com/list/ or a non-public localhost for development.