Ranked in these QuestionsQuestion Ranking
Pro Complete suite of layout algorithms
yFiles supports different major layout styles:
Also there are dedicated edge routing algorithms (orthogonal, organic, and octilinear), support for partial and incremental layout, and all algorithms can be customized and extended at multiple levels.
Pro Extensive Documentation
The huge API requires a solid documentation. The API is fully documented, there are source code tutorials and a great number of source code examples and an extensive developer's guide.