A great editor which works everywhere Java does. I used it for almost a decade alongside a few embedded SDKs, and on Mac, Linux, and Windows. The ability to quickly define my own syntax file was great for working with a niche language like Verifone TCL.

Find/replace among many files at once was also in the normal find dialog, with a solid regexp implementation. Which seemed rare for the era in which I used it.

These days we have VS Code and JetBrains so I don't use it any more. Still, much nostalgia.