Graphviz Alternatives

PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.

Gephi is an open-source software for visualizing and analyzing large networks graphs.

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.

Online diagramming application

Cytoscape Official Web Site

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.

Search and visualize your graph data through a simple web-based interface

OmniGraffle is for creating precise graphics like website wireframes, an electrical system designs, or mapping out software class.

Dia is a GTK+ based diagram creation program for GNU/Linux, MacOS X, Unix, and Windows, and is released under the GPL license.

The JavaScript toolkit for graph visualization

Draw, LibreOffice, ODF, open standards, creative software, vector drawing

Simplify and communicate complex information using data-linked diagrams.

LaTeXDraw is a graphical drawing editor for LaTeX.