Protean IDE is a highly-functional program written by Rob Hutchinson to assist BlitzBasic

Blitz BASIC

Blitz BASIC refers to the programming language dialect that was interpreted by the first Blitz compilers, devised by New Zealand-based developer Mark Sibly. Being derived from BASIC, Blitz syntax was designed to be easy to pick-up for beginners first learning to program...

 programmers. It has full functionality with BlitzPlus, Blitz2D and Blitz3D. It has limited support for BlitzMax.

Although Protean was originally commercial software, Rob Hutchinson released it under one the Creative Commons licenses

Creative Commons licenses

Creative Commons licenses are several copyright licenses that allow the distribution of copyrighted works. The licenses differ by several combinations that condition the terms of distribution. They were initially released on December 16, 2002 by Creative Commons, a U.S...

due to lack of development updates. Both binary release and the source code are publicly released and available for download. Rob Hutchinson left a closing comment when development of Protean IDE terminated:

"A massive thank you to EVERYONE who bought Protean when it was commercial software, it would never have survived as long as it did without your support! Thanks to everyone on the Blitz Dev team for making an excellent product, and lets hope someone can produce something awesome from the source! I look forward to seeing what people come up with."