I have a data structure that represents a directed graph, and I want to render that dynamically on an HTML page. These graphs will usually be just a few nodes, maybe ten at the very upper end, so my guess is that performance isn't going to be a big deal. Ideally, I'd like to be able to hook it in with jQuery so that users can tweak the layout manually by dragging the nodes around.
Note: I'm not looking for a charting library.
I've just put together what you may be looking for: http://www.graphdracula.net
var g = new Graph(); g.addEdge("strawberry", "cherry"); g.addEdge("cherry", "apple"); g.addEdge("id34", "cherry");
I used the previously mentioned Raphael JS library (the graffle example) plus some code for a force based graph layout algorithm I found on the net (everything open source, MIT license). If you have any remarks or need a certain feature, I may implement it, just ask!
You may want to have a look at other projects, too! Below are two meta-comparisons:
SocialCompare has an extensive list of libraries, and the "Node / edge graph" line will filter for graph visualization ones.
Here's a list of similar projects (some have been already mentioned here):
vis.js supports many types of network/edge graphs, plus timelines and 2D/3D charts. Auto-layout, auto-clustering, springy physics engine, mobile-friendly, keyboard navigation, hierarchical layout, animation etc. MIT licensed and developed by a Dutch firm specializing in research on self-organizing networks.
Cytoscape.js - interactive graph analysis and visualization with mobile support, following jQuery conventions. Funded via NIH grants and developed by by @maxkfranz (see his answer below) with help from several universities and other organizations.
sigma.js Lightweight but powerful library for drawing graphs
jsPlumb jQuery plug-in for creating interactive connected graphs
Springy - a force-directed graph layout algorithm
JS Graph It - drag'n'drop boxes connected by straight lines. Minimal auto-layout of the lines.
RaphaelJS's Graffle - interactive graph example of a generic multi-purpose vector drawing library. RaphaelJS can't layout nodes automatically; you'll need another library for that.
JointJS Core - David Durman's MPL-licensed open source diagramming library. It can be used to create either static diagrams or fully interactive diagramming tools and application builders. Works in browsers supporting SVG. Layout algorithms not-included in the core package
GoJS Interactive graph drawing and layout library
yFiles for HTML Commercial graph drawing and layout library
KeyLines Commercial JS network visualization toolkit
data visualization software lab Commercial multi-purpose visualization library
Cytoscape Web Embeddable JS Network viewer (no new features planned; succeeded by Cytoscape.js)
Moo Wheel Interactive JS representation for connections and relations (2008)
JSViz 2007-era graph visualization script