I have done many projects for myself to use in my company using Google spreadsheet as data base and Google apps script for creating standalone web app using HTML, CSS, JavaScript & jQuery. Measurement books, Abstract of cost etc are being done online with data automatically saved in to database in google spreadsheet & Google drive. All files uploaded being saved in specific folder inn google drive with saved file url is used for viewing the file anytime with webApp. Automate task in Google Spreadsheet using google apps script. Many more...