Brainstorming for content is a usual thing. What are the best tools for it?
I was very much surprised by your topics headline.
Anyway, try feedly. Its an excellent tool to generate topic ideas.
Nobody can generate ideas for you. You have to do it yourself. Go to social networks see what's trending in your niche.
The Brainstorming Tools are:
Bubbl.us
Coggle
Freeplane
LucidChart
Mind42
MindMap
Popplet