Popular file sharing app SHAREit has recently confirmed on twitter that they are working on a Windows 10 Universal app.
@rgis1369 Yes, we still need improving! universal app for windows 10 is being developed. Please stay tunned!
— SHAREit (@bestSHAREit) October 30, 2015
SHAREIt has more than 50 million downloads on Android and has long had an app in the Windows Store.
Making a Windows 10 specific app however would give the app access to newer APIs only available on Windows 10 such as WIFI Direct.
The current version of the app , which is itself still pretty powerful, can be found in the store here.