The demand for web-based applications plus the need for online collaboration plus the amazing web interfaces that can be created with new technologies (e.g. HTML5 canvas) has created a “new” market for modeling tools: web-based modeling tools. In fact, they are more drawing tools than modeling tools but still, they at least offer you a way to draw and share your (UML/ER/BPMN) models online.
If you want to give them a try (most offer a free plan or at least a free trial), the five tools I’ve been more looking into (let me warn you, don’t expect me to declare a winner, just decide by yourself!) are, in alphabetical order,:
Online diagramming and collaboration. Several modeling languages supported (including UML). For a short introduction see the presentation of this tool for the portal readers in a guest post by Creately authors , see here
Fails in the collaborative aspect and it’s less feature-rich than the others but I love its simplicity. All you see is a empty canvas ready for you to start drawing. Support for BPMN notation.
Modeling tool (right now only supporting class diagrams) with some code-generation capabilities. Featured in the blog here.
Support for UML and BPMN diagrams (among many other types). They claim to be “the most widely used online diagramming application”, I wonder how they know that. Collaboration and revision control features available.
Flow charting tool with support for all major UML diagrams (and also BPMN). The tool has a demo mode you can use to try it for free. Works also when you are offline and there is a desktop version available so you can choose.
HTML5-based. With UML support and real-time collaboration capabilities. It can import Visio files, which is definitely a plus considering that all these tools seem an online version of Visio and are probably targeting the same kind of users.
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