All the downloads that are available for Orthanc, including official releases and precompiled plugins.
Remark: All the Windows binaries from this Web page (i.e. all the .exe and .dll files) are compiled for 32bit architecture. Consequently, the precompiled plugins (.dll) can only be used by a 32bit version of Orthanc. An installer for Windows 64bit, containing all the plugins, is available on this page courtesy of Osimis.