You can use packages that have been converted to not use the GC and all of the libraries you would be using in C or C++.
You still get the following language features, which is more than what C, C++ or Rust have to offer (though Rust is hot on D's trail).
Unrestricted use of compile-time features
Full metaprogramming facilities
Nested functions, nested structs, delegates and lambdas
Member functions, constructors, destructors, operating overloading, etc.
The full module system
Array slicing, and array bounds checking
RAII (yes, it can work without exceptions)
scope(exit)
Memory safety protections
Interfacing with C++
COM classes and C++ classes
assert failures are directed to the C runtime library
switch with strings
final switch
unittest
printf format validation
