Neonto - Visual tool for creating native iOS and Android UIs
Sheetsu - Turn Google Spreadsheet into API
LetterNote - Fine Stationery, Art Prints, Accessories & Collectibles
SpreadSimple - A blazing-fast way to create and manage sites using Google Spreadsheets
Rainbow Pencils - Make rainbows whenever you sharpen.
SheetAside - Access your Google Sheets from where you are