Here is a list of resources I rely on most & some great blogs & books too:

JIRA – full project and issue management tool. If you’re working on a serious IT project, you’ll need it.
Sketch – the easiest way to create simple, high fidelity designs
Trello – For simple task management
AppAnnie – the best place for competitor research & market trends
AppStore Connect – for managing iOS apps (for the worlds biggest company the interface is awful!!)
Google Play Console – for managing Android apps (also store AB testing)
Facebook developer console – for managing API’s at the blue monster
Amplitude – plug and play mobile and web analytics
Optimizely – plug and play Ab testing
Google Analytics – basic (& free) web performance tracking
AppsFlyer – deeplink management (a must for mobile apps)
Mixpanel – Another full stack analytics option
Typeform – I find this the best survey builder for getting customer feedback
UX Cam – screen recording for customer research
Slack – Necessary evil – 21st century Messenger for teams
Stack Overflow – Forums for developers – I use it rarely

Blogs & news
TechCrunch – the best technology news site
Crunchbase – startup info and funding
Product Hunt – New products just launching (also be sure to put any new launch up here)
Mind the product – strong community blog with great variety
Andrew Chen – fantastic quality essays with a focus on growth
Nir Eyal – Buy his book Hooked too – a useful read – the psychology behind habit forming products
Roman Pichler – good product blog focussing on product strategy
Ken norton – Google Ventures partner – ex Google PM wizard
Tyner Blain – great deep thought blog with a focus on the psychology of products

Books (in no particular order)
Lean Startup – Eric Ries – Great literature on approaching innovation
Zero to One – Peter Thiel – Growing an innovative first company
The Hard Thing About Hard Things by Ben Horowitz – A no fluff account on the difficulties of building a business
Sprint: How to Solve Big Problems and Test New Ideas in Just Five Days by Knapp, Jake
“Hooked: How to Build Habit-Forming Products” by Nir Eyal – talks through addiction loops & offers a great way to look at building products
High Growth Handbook by Elad Gill. – great advice from many experienced people about creating companies and this is one of the best collections of raw knowledge and thinking.
Multipliers: How the Best Leaders Make Everyone Smarter by Liz Wiseman
Lean UX by Jeff Gothelf