A new version of Windows 10 has just been leaked. Windows 10 build 10056 mostly brings changes to the UI of Microsoft's new operating system. 
So if you install it you will see a new Recycle Bin icon, a new optimized start menu and many other small tweaks that make it look different from previous builds.
Windows 10 build 10056 was distributed to Microsoft partners several days ago. This version will probably not be available to the Windows Insiders program.
However, those who have already tried it report that this build is much more stable than build 10051 that leaked last week.
If you are looking for download links of ISO files you should refer to MDL.
The technical details of the ISO image are:
crc32: 870e97e8
md5: 09676fbe81b7b05a731f1cb6189e7559
sha-1: A024a3ba78ef5e9e5660f3b410d35b1304a7a163
