JetPack Data - JetPack Data proposes an intuitive data analytics and visualization platform geared for 'the common man'. Using advanced Machine learning techniques, JetPack Data does the analysis for you and not the otherway around!
Dia - Dia is a GTK+ based diagram creation program for GNU/Linux, MacOS X, Unix, and Windows, and is released under the GPL license.
Whatagraph - Whatagraph is the most visual multi-source marketing reporting platform. Built in collaboration with digital marketing agencies
draw.io - Online diagramming application
Microsoft Power BI - BI visualization and reporting for desktop, web or mobile
yEd - yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.