GraphChi parsers toolkit by Danny Bickson.
From the post:
To the request of Baoqiang Cao I have started a parsers toolkits in GraphChi to be used for preparing data to be used in GraphLab/ Graphchi. The parsers should be used as template which can be easy customized to user specific needs.
Danny starts us off with an LDA parser (with worked example of its use) and then adds a Twitter parser that creates a graph of retweets.
Enjoy!