My team at IBM is developing a tool that integrates several key data science open source technologies all in one. It's called the Data Scientist Workbench (http://datascientistworkbench.com). It doesn't currently support SystemML yet, but it already integrates iPython/R/Scala with Spark, for example. The idea is to have all the tools you'll need for data analysis and visualization, in the cloud, directly accessible anytime from your browser. We plan to include SystemML in the future.
