How can I perform Optical Character Recognition and have it read with Text-To-Speech? I know about the (Danish) app SkanRead, but apparently it is discontinued, so I'm looking for alternatives.

The only function I need is that it should allow using the camera to take a photo of some text, and then (some kind of) text-to-speech is used to read the text.
There are at least two apps which correspond with your wishes: Scanthing OCR explicitly announces your request (OCR with TTS)1, and also Google Goggles2 seems to support it:

 

While the former wants to be paid (~EUR 4) but fully supports what you want, the latter is free -- but I'm not sure whether it reads text via TTS.