There is a wealth of learning resources available to anyone who is interested. I combine training sites, book subscription sites, audiobook subscriptions, and others to keep learning. Below are some of my favourites.

www.bookboon.com - free and paid books
www.mindtools.com - free app and articles, personalised learning behind a paywall
www.learnoutloud.com - free and paid audiobooks, podcasts, etc.
www.scribd.com - subscription books and audiobooks
www.audible.com - mainly paid audiobooks
www.amazon.com - free and paid books
www.coursera.com - online courses
www.slideshare.net - presentations
safaribooksonline.com - paid subscription to access technical books and resources
Blinkist app - great app that summarises books into summaries called 'blinks' - great to try books and audiobooks
iTunes U - online courses and podcasts