roobuilder is described as 'It's a cross between Glade / Visual Studio — the idea is that most 'action' code for an application is actually quite simple - so entering the code on the event handlers for a widget makes the proximity of code to action better' and is a IDE in the development category. There are more than 50 alternatives to roobuilder for a variety of platforms, including Windows, Linux, Mac, BSD and Web-based apps. The best roobuilder alternative is Visual Studio Code, which is free. Other great apps like roobuilder are VSCodium, Microsoft Visual Studio, Eclipse and Apache NetBeans.