Bookicious - Find the best new book to read with books collections for makers, founders and entrepreneurs.

productboard - Beautiful and powerful product management.

Goodreads - See what your friends are reading.

Aha - Aha! is the new way to create visual product roadmaps. Web-based product management tools and roadmapping software for agile product managers.

Bookcelerator - A curated directory of books that will make you smarter

ProdPad - ProdPad helps your team gather ideas, surface the best ones and turn them into product specs, and then put it all on a product roadmap.