Lot of thing to learn from Microsoft Build 2015
I am very happy and excited with the new Microsoft is doing on tooling, cloud service and mobile/web dev stuff. Microsoft Build 2015 There are a lot of good talks.
Especially the new office add-ins development will be a good opportunity for indie developer who has good web experience and some business domain knowledge. Since these add-ins (written in js/css/html) will be available in all platforms including iOS and Android. Unlike other marketplace, user there are willing to pay for useful service even if very small task.