Open365 – an Open Source Alternative to Microsoft Office 365
Windows / Mac / Linux / Android: One of the main advantages of Microsoft Office 365 over open source alternatives is the ability to sync documents over the cloud so you can edit them anywhere. Open365 has come to a close to finally match this feature set.
Open365 works in much the same way as Office 365. This suite is based on LibreOffice Online so that you can open documents in the browser or use any of the Windows, Mac, Linux and Android client applications to open them. Open365 also gives you 20GB of cloud storage to store files that will sync across your devices.
The service is currently in beta testing, however the developers are also planning to release tools that will allow you to host your own servers. This helps it stand out from services like Office 365 and Google Docs, giving you a comparable set of features without compromising control over your data.