One of the huge advantages of Netbeans is it's amount of free documentation, resources, demos and podcast / screencast coverage. Most of the resources are available online, which is not always easily accessible. Especially in the "dead-time" (trains, plains and hotels) internet access is not always available. Part of the netbeans documentation is available for download (42 MB) as well. The downloadible package contains resources from Basic IDE, over Java programming, Java EE, Ruby and Mobile to C/C++ programming.