Board
Board is a diagram (graph visualisation) library ported from JGraphX to Dart and released under the BSD license.
Board provides functionality for visualisation and interaction with nodeedge graphs (not charts). Example applications that you might write with it are a workflow editor, an organisational chart, a business process modelling tool, a UML tool, an electronic circuit diagrammer, network/telecoms visualisation (you get the idea, things with nodes and edges that connect those nodes, a mathematical graph).
Board also includes functionality like XML stencils support, various import/export and layouting (automatically node/edge positioning).
Libraries
 graph.analysis
 graph.canvas

Copyright (c) 20072010, Gaudenz Alder, David Benson
 graph.costfunction
 graph.exception
 graph.generatorfunction
 graph.io
 graph.io.graphml
 graph.layout
 graph.layout.hierarchical

Copyright (c) 20052012, JGraph Ltd
 graph.layout.hierarchical.model
 graph.layout.hierarchical.stage
 graph.layout.orthogonal

Copyright (c) 20082009, JGraph Ltd
 graph.layout.orthogonal.model

Copyright (c) 20082009, JGraph Ltd
 graph.math
 graph.model
 graph.reader
 graph.shape
 graph.sharing
 graph.swing
 graph.swing.handler
 graph.swing.util
 graph.swing.view
 graph.util

Copyright (c) 20072012, JGraph Ltd
 graph.util.awt
 graph.util.property_change
 graph.util.xml
 graph.view