Here is a screen capture of JBuilder without any skin (in Metal Look And Feel): jbuildermetal.gif.

JBuilder with the Aqua theme pack, one of the possible skins: jbuilderaqua.gif.

The binary is located at Borland's web site: Borland Code Central (July 19, 2003) If I remember correctly, you need to have a developer account to download on this site, but you get more information.
Here is a local copy of it: skinlookandfeelot.zip

All the necessary information regarding the application is within the distributed zip file.