A Survey of Graph Databases for the Java Programmers
Jasper Pei Lee provides an overview of the following graph databases from the perspective of the Java developer: Neo4j, InfiniteGraph, DEX, InfoGrid, HyperGraphDB, Trinity, AllegroGraph:

His review is similar to the Quick Review of Existing Graph Databases, but stays focused on using these graph databases from a Java environment, this making it less generic than the NoSQL Graph Database Matrix.
The only part that I didn’t understand is the closing:
High-performance and distributed deploy are supposed to be supported by all products.
Without qualifying what high-performance means is difficult to assess if all reviewed products are on par[1]. And scaling graph databases is far from being a solved problem.
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AllegroGraph takes pride in breaking records related to the number of stored triples, while others are focused on access speed, or reliability. ↩
Original title and link: A Survey of Graph Databases for the Java Programmers (©myNoSQL)
via: http://jasperpeilee.wordpress.com/2011/11/25/a-survey-on-graph-databases/