It mainly a diagram maker software in which you can find many shapes and elements to create different types of diagrams.
Dynamic Draw is the next free open source Visio alternative for Windows.Their goal for Pencil Project is to make diagramming as easy as possible and usable for everyone from a newbie to an expert Open Source Microsoft Office Visio Alternatives The software has an online version, and it supports Windows and Mac operating systems Pencil Project is an open-source alternative to Microsoft Visio which is actively maintained by the development community. You can use it for mathematical equations, databases management, multimedia slides, 3D illustrations, and project management etc. Mac Apache OpenOffice is another open source Visio alternative. Almost everyone think this is great alternative to Microsoft Office Visio.
(previously draw.io) is a free online diagram drawing application for workflow, BPM, org charts, UML, ER, network diagrams.
