Rattle is described as 'GUI for data mining using R. All interactions through the graphical user interface are captured as R script. It presents statistical and visual summaries of data, transforms data, builds machine learning models, and scores new datasets' and is an app. There are more than 10 alternatives to Rattle for a variety of platforms, including Windows, Linux, Mac, Self-Hosted solutions and Xfce. The best alternative is R (programming language), which is both free and Open Source. Other great apps like Rattle are RStudio, esquisse, RKWard and BlueSky Statistics.
Rattle is mainly a Statistical Analyzer but alternatives to it may also be Programming Languages. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Rattle.
Deducer is designed to be a free easy to use alternative to proprietary data analysis software such as SPSS, JMP, and Minitab. It has a menu system to do common data manipulation and analysis tasks, and an excel-like spreadsheet in which to view and edit data frames.
The ML Studio is interactive for EDA, statistical modeling and machine learning applications. Based on Shiny, with Plotly interactive data visualization, DT HTML tables and H2O machine learning and deep. data science pipeline workflow.
ggraptR is an open source R package providing a GUI for visualization. It is based on principles of visualization analysis by Tamara Munzner, and also acts as a wrapper for functionality implemented in the grammar of graphics for R, ggplot2.