StrongDC++ is a client for downloading files in Direct Connect network. It's based on CZDC++, which is made by PPK, and contains a lot of interesting features. Since DC++ has been released as Open Source, you can download a source code and edit it.
What's new in this version:
DC++ 0.699 SVN update
fixed deadlock on some queue operations
fixed some memory leaks (THX redsaq)
TTH inconsistency doesn't remove the source from queue anymore
when tempfile doesn't exist, the file will be completely redownloaded
fixed missing Pk and Lock strings in some cases
点这里下载-> StrongDC++ 2.21