Is it possible to achieve the View/Edit documents (especially MS-Word docs) functionality online without using SharePoint as most of the examples available on net revolves around SharePoint?

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ASP.NET

MVC

I are looking for functionality to View/Edit documents (especially MS-Word docs) online in browser and below are our queries on the same:
1. Is it possible to achieve the View/Edit documents (especially MS-Word docs) functionality online without using SharePoint as most of the examples available on net revolves around SharePoint? Please suggest.
2. We are referring the link http://wopi.readthedocs.org/en/latest/ which says that it is possible to implement though the article itself is in development phase.  This says SSL are required for any such integration and documents should be publically accessible. How can we check the functionality with development environment due to such restrictions? Please suggest
3. Is there any specific membership/development account required with MS-Office (OWA) for integration process?
4. Can we have some sample code/links available for the same? Please suggest. We reviewed https://code.msdn.microsoft.com/office/Building-an-Office-Web-f98650d6 though it seems to have dependency with SharePoint.
5. We are referring to https://onenote.officeapps.live.com/hosting/discovery for OWA integration for WOPI Discovery. How can we check if the OWA is calling WOPI REST END POINTS?
6. We tried by creating a sample WOPI Client app though while opening the Word File we receive errors "Service Unavailable" & "Unable to establish secure connection". Please guide us on the same as the later seems SSL error in local environment but we are not sure about the first error.