Product Resources List - The biggest list of free product management resources
SearchFiles - SearchFiles is the name of a premium level of file search engine that gets the data from the leading shared file servers of the world.
Product Wednesday - Every Wednesday, receive a handpicked selection of tools made for Product Managers, Product Designers, UX Researchers and every member of the Product team.
FilePursuit - FilePursuit is probably the most sophisticated platform that is offering a best in the class search engine for file links.
Intercom on Product Management - The ultimate resource for aspiring product managers
uvrx - UVRX is an independent search engine for finding files from the leading shared files servers on the internet.