NetBeans 6.5 comes with Subversion integration built-in. To make the integration work, you need to download and install a Subversion command line client. Oracle and CollabNet partner to give you easy access to client-only CollabNet Subversion installers on common platforms. CollabNet Subversion binaries are compiled from the open source code and certified by CollabNet.
NetBeans 6.8 and higher comes with built-in Subversion integration. You can find out more at the NetBeans/Subversion home page. If you are using NetBeans 6.0 or earlier, download one of the clients below.
Note for Windows users: If you are using NetBeans 6.8+, the IDE is able to download and install the Subversion client software automatically when Subversion is used for the first time You do not need to preinstall Subversion client software onto your computer.
If you are using a version of NetBeans prior to 6.8, download one of the clients below.
CollabNet Subversion Downloads for NetBeans
Community Downloads 
CollabNet Subversion Server