draw.io is described as 'Privacy-focused diagramming software supporting real-time collaboration, offline mode, and cloud storage without ads or registration' and is a leading Diagram Editor in the development category. There are more than 100 alternatives to draw.io for a variety of platforms, including Web-based, Windows, Mac, Linux and SaaS apps. The best draw.io alternative is Dia, which is both free and Open Source. Other great apps like draw.io are LibreOffice - Draw, Excalidraw, yEd Graph Editor and TreeSheets.
Zen Flowchart is the simplest tool to create flowcharts, org charts, process charts, sitemaps, and more. With a minimal and intuitive user interface, creating diagrams with Zen Flowchart is very easy and delightful.
Scapple is an easy-to-use tool for getting ideas down as quickly as possible and making connections between them. It isn’t exactly mind-mapping software—it’s more like a freeform text editor that allows you to make notes anywhere on the page and to connect them using straight...
Flowgorithm is a free application that helps you create programs using simple flowcharts.
Design flowcharts, UML, Venn, and mind map diagrams with customizable templates, varied symbols, shapes, connector styles, overlapping sheet support, and intuitive drag-and-drop editing. Export visuals as images, edit multiple diagrams, and organize complex data visibly.
Simple vector graphics editor for creating flowcharts, UML class diagrams, illustrations and slide shows.
A daily drawing tool that supports low code for learning or office use. It can be used for flowchart, mind map, UML diagram, ER diagram, network topology diagram, BPMN, Venn diagram, database model diagram, whiteboard drawing, infinite canvas, and more.
Lekh Diagram empowers you to express your idea on iPad and iPhone simply by sketching shapes with your finger.
Moredraw is a thought recording whiteboard with multiple types of nodes built in, including flowcharts, mind maps, pictures, notes, videos, to-do lists, charts, etc. Any node can be linked to help you organize your thoughts.
ZenUML is a tool generating sequence diagrams from markup text. You can write Java-like code and it generate diagram from it.
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That's a programming environment, not just diagram editor. And diagrams except flow chart cannot be edit by this one