DICOMan is described as 'All-In-One DICOM Wizard for Radiation Oncology and Radiology'. There are more than 10 alternatives to DICOMan for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and iPhone. The best alternative is RadiAnt DICOM Viewer, which is free. Other great apps like DICOMan are MicroDicom (Free), Horos (Free, Open Source), Weasis (Free, Open Source) and Miele-LXIV (Free, Open Source).
MicroDicom is application for primary processing and preservation of medical images in DICOM format It is equipped with most common tools for manipulation of DICOM images and it has an intuitive user interface.
Weasis is a multipurpose standalone and web-based DICOM viewer with a highly modular architecture. It is a very popular clinical viewer used in healthcare by hospitals, health networks, multicenter research trials, and patients.
Miele-LXIV is a DICOM workstation, viewer and more. The project started in November 2014 as a fork of the popular open source 32-bit project OsiriX, but it has been modified to become a 64-bit application and to remove many of the limitations of the 32-bit version.
postDICOM is a cloud-based DICOM Viewer and clinical documents viewer. You can upload DICOM files and clinical documents using web browsers. You can upload and view your DICOM files from PCs(Windows, MacOS, Linux), tablets and phones(IOS and Android).