Oqto Diagram Alternatives

Nektony Mac Visio Viewer is a fully featured application for Mac OS X operating systems to view MS Visio files.

Graphity is a diagram editor that can be used to quickly and effectively generate drawings and to...

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GeneVenn is an online diagram editor that allows the users to enter the list and may use the text area in order to assign letters on the list in the diagram.

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.

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

Online diagramming application

Open Source

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.

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

Open Source

Choose from a wide variety of shapes to create diagrams and charts. Free from Google.

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.

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.

UMLet - Free UML Tool for Fast UML Diagrams