Hi,
even if not closely related to Hadoop-Java, Rstudio is a
killer app for Data Scientists who develop R code. It's under
AGPLv3 and can be executed in two modes: as an IDE (desktop-side),
as a webapp (server-side). They release already .rpm packages.
http://www.rstudio.com/ide/
Bye
--
Daniele Medri
https://twitter.com/dmedri