Gantt - Create beautiful Gantt charts
AnyChart - Award-winning JavaScript charting library & Qlik Sense extensions from a global leader in data visualization! Loved by thousands of happy customers, including over 75% of Fortune 500 companies & over half of the top 1000 software vendors worldwide.
Online Gantt - A free MS Project alternative for simple gantt charts
Highcharts - A charting library written in pure JavaScript, offering an easy way of adding interactive charts to your web site or web application
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Google Charts - Interactive charts for browsers and mobile devices.