NetBeans

To apply patches to code using NetBeans:

Open the project and right-click on the file or folder you want to patch.
Tools > Apply Diff Patch...
Browse to and select the patch file you want to apply. > Click "Patch".

Quoted from Drupal.org site

I used it to apply patches on Views Calc module. It worked only when I initiated the action from the file, and not from the module's folder.