Back to the past: NetBeans IDE splash screens since 3.5.1
Retro alarm! You can still download all the NetBeans IDE versions since 3.5.1. I installed them all in a VM, ran them and captured some images for you. BTW NetBeans 3.5.1 runs on JDK7 – or at least it started.
The previous released can be downloaded at http://www.netbeans.info/downloads/dev.php.