Photivo is a free and open source photo processor. It handles your RAW files as well as your bitmap files in a non-destructive 16 bit processing pipe with Gimp workflow integration and batch mode.
A week of Windows 10, holograms and Exploding Kittens on Mars
Office 2016 launching this year, touch apps coming soon
Microsoft reveals the next version of Windows 10
Introducing Windows 10 for phones
Hands on with HoloLens
Download: Windows 10 build 9926