Total Commander is a Windows based file management program with the good plugin system.

AlReader is a mobile reader app.

RepliGo Reader enables PDF viewing, annotating, printing and form filling.

EBookDroid is a highly customizable document viewer for Android.

Jumptuit connects your on-the-go life and work style with your cloud services and smart devices.

FilesAnywhere is a provider of remote file storage and file sharing for consumers and corporations.