Compare software

C3 vs D Programming Language: catalog facts
C3	D Programming Language
Free Free and open source; the compiler and standard library use LGPL-3.0 and MIT licences.	Free Free and open source.
Windows, Linux, Web, Command line	Windows, macOS, Linux, Command line
Syntax close to C, with a C-to-C3 guide Optionals, generics and compile-time reflection	Compiles to fast native code Familiar C-like syntax with modern features
Pre-1.0 language that may still change Smaller ecosystem than C or C++	Smaller community and library ecosystem than C++ or Rust
Downloadable app, Web application	Downloadable app
Open source	Open source
License: LGPL-3.0-or-later, MIT	License: BSL-1.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.