Vecteezy Editor - Free Online Vector Editor - Design and customize SVG illustrations and graphics quickly and easily in your browser.
draw.io - Online diagramming application
Sketch - Professional digital design for Mac.
LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
CorelDRAW - CorelDraw is a world’s most leading Graphic Design Software solution created by Corel Corporations.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.