What are some alternatives?
When comparing Crystal Ball and RapidMiner, you can also consider the following products
SAS Advanced Analytics - SAS Advanced Analytics product suite covers data mining, statistical analysis, forecasting, text analytics, optimization and simulation.
Scikit-learn - scikit-learn (formerly scikits.learn) is an open source machine learning library for the Python programming language.
SAP Predictive Analytics - Predictive analytics software
Pandas - Pandas is an open source library providing high-performance, easy-to-use data structures and data analysis tools for the Python.
Board - Unified BI, CPM and predictive analytics software.
NumPy - NumPy is the fundamental package for scientific computing with Python