Pentaho offers comprehensive data integration and analytics platform.
ETL engine based on Groovy
NBi is a testing framework (add-on to NUnit)
World's first open source data quality & data preparation project
Design, automate, operate and publish data pipelines at scale
Data quality analysis, profiling, cleansing, duplicate detection +more
Adhoc Data Exploration - Live & Easy
sparse and dense matrix, linear algebra, visualization, big data
automate Informatica control file creation
giServer the easy to use and extensible batch and integration server
Open source Extract Transform Load engine written in Java