You might find these useful:
- Learn++.NSE from Prof.Robi Polikar. This is his official page which offers lots of additional information, papers on the topic etc. and it is a great starting point.
- The GitHub repository of gditzler contains an implementation of incremental learners in MATLAB.
Additionally the Concept Drift wiki page, under sections Projects and Meetings has lots of other materials.hth.
UPDATE
I came across a paper
- "Incremental Learning of Support Vector Machines" by Classiffier Combining by Wen and Lu.
stating superior performance and efficiency than concept drift methods.