NppToR is described as 'Description' and is an app in the Development category. There are six alternatives to NppToR for Windows, Linux, Mac, BSD and Xfce. The best alternative is R (programming language), which is both free and Open Source. Other great apps like NppToR are RStudio (Free, Open Source), SOFA Statistics (Free, Open Source), Minitab (Paid) and Tinn-R (Free, Open Source).
SOFA Statistics is an open-source statistical package, with an emphasis on ease of use, learn as you go, and beautiful output. The name stands for Statistics Open For All. It has a graphical user interface and can connect directly to MySQL, SQLite, MS Access, and MS SQL Server.