Polaris Viewer Plus
6.2#11 in file viewer softwareAndroidiOSWebmacOS
VisitViewer Plus suits organizations that need document viewing and annotation in groupware, messengers or other workflows. Its pen tools and mobile input support may also suit people who work with documents on touch devices.
ViewAnyFile.app suits people who want to view or convert varied file types in a browser, including on phones, tablets, or desktops. Clinical users should note its stated HIPAA certification limitation.