For the open-source software RapidMiner (formerly YALE) (GPL), several different ways of support are provided including a user forum, support trackers, feature request trackers, and a bug tracker. We use a mailing list for interested users in order to announce new releases or other important RapidMiner issues. Of course this support is as free as the usage of RapidMiner itself.
Beside these possibilities, the professional users of RapidMiner have access to a premium support service which guarantees a quick support, solutions and fixes for all issues regarding RapidMiner.
Eclipse is a widely used open-source IDE for Java.
The main strengths are the powerful support for refactoring and Java coding in general.
This article describes in a few steps how to setup Eclipse for Subversion access to RapidMiner,
how to build RapidMiner from source code, and how to run RapidMiner directly from Eclipse.