Companies who obsess over the user experience win over time. Cashflow Portal really obsesses over the user experience (syndicator and investor). Its a RE tech company built by true RE and tech talent.
ZoomCharts - Creating meaningful and aesthetically pleasing data visualizations and incorporating them into your projects is easy with the tools offered by ZoomCharts.
Peerstreet - Finances real estate through a form of crowdfunding.
Google Charts - Interactive charts for browsers and mobile devices.
Ark7 - Choose a property and invest in shares
Highcharts - A charting library written in pure JavaScript, offering an easy way of adding interactive charts to your web site or web application
RealtyShares - Real Estate Investing in 20 Minutes