From Worms Knowledge Base
D is a fast, compiled systems-programming language, taking the best features from C++, C#, Java, Python and others. Since D is very similar in syntax to C-like languages (C++, C#, Java), programmers familiar with those languages should have very little trouble learning D. D introduces a lot of features over C++ which boost programmer productivity. It has full C and partial C++ linking capabilities, thus D programs can be made to work with most C/C++ libraries.
HostingBuddy, WebSnoop, Help, SheriffBot and the WormNAT2 proxy are written in D. Some of the code can be reused for W:A 4.