KeyLines Alternatives

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

Open Source

UMLGraph is a professional automated drawing tool that allows the designers the declarative specification and drawing of UML class and sequence diagram.

Create a free website with Wix.com. Customize with Wix' website builder, no coding skills needed. Choose a design, begin customizing and be online today

Visit website

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.

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

Online diagramming application

Open Source

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.

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

ArgoUML, free and safe download. ArgoUML latest version: Open-source diagramming application for personal computers. ArgoUML is a program that allows users to create complex and professional diagrams.

Graphviz is open source graph visualization software. It has several main graph layout programs.

UMLet - Free UML Tool for Fast UML Diagrams

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

Open Source

StarUML

Gaphor is a Python-based, open source, multiplatform and multipurpose modeling application for creating nice UML diagrams for documentation.