Incomplete file downloaded over the Internet with DC++, an open source Direct Connect compatible alternative client used for file sharing; if a DCTMP file download is stopped, it can be resumed by DC++ as long as the file is available on an active server.
Program(s) that open dctmp files
Windows: DC++
Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/dctmp
