LDC
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LDC is an implementation of D.
Other implementations of D.
LDC is an example of a compiler. You may find the programming tasks that have been solved using it here.
This D compiler uses the DMD front end and the LLVM backend. It is very up to date, generally produces the fastest code of all the D compilers, and comes bundled with tango. A significant downside is the lack of exception support in windows (this is a LLVM backend issue).