Fluid - Turn Your Favorite Web Apps into Real Mac Apps.
Sheety - Turn any Google sheet into an API instantly, for free. Power websites, apps, or whatever you like, all from a spreadsheet. Changes to your spreadsheet update your API in realtime. Neat
WebCatalog - Run your favorite web apps natively
Sheetsu - Turn Google Spreadsheet into API
Web2Desk - Web2Desk is a tool to convert your favorite websites to Desktop app in just one click.
SheetBest - Turn a Google SpreadSheet into a JSON Database API