A list of free Microsoft Visio alternative software to prepare complex diagrams includes Kivio, Graphviz, Inkspace, Open Office Draw, and DIA Diagram Editor.

Visio comes with an extensive library of templates, covering everything from organizational charts and network diagrams to building layouts and data flow maps.

Create vibrant, crisp diagrams more effectively with lifetime access to Microsoft Visio Professional 2021, now just $19.97 through April 22 at 11:59 PM Pacific.