RStudio - RStudio™ is a new integrated development environment (IDE) for R.
think-cell chart - think-cell features 40+ chart types and dozens of data-driven visual enhancements.
PSPP - PSPP is a free software application for analysis of sampled data.
GanttProject - Project scheduling and management tool
IBM SPSS Statistics - IBM SPSS Statistics is software that provides detailed analysis of statistical data. The company behind the product practically needs no introduction, as it's been a staple of the technology industry for over 100 years.
Vizzlo - Create high-quality charts and business graphics easily online, in PowerPoint, or Google Slides.