Alternative products to PSDboom

PSDboom

Free and premium design resource

5 alternative and related products to PSDboom

Hacking UI

Podcast, Newsletter & Blog about Product Design & Creation

Hacking UI is a Podcast, Newsletter & Blog about Product Design, Creative Entrepreneurship, and Front End Development, brought to you Sagi Shrieber and David Tintner

Anne-Laure Le Cunff- Founder @ Lysa. Ex-Google.
Have a look at their "courses" section - lots of good resources there!
HackingUI
Author note (updated on April 2017): This post was written in November 2015, and published on January 2016. 6 months after publishing this article (and sooner than expected), David -my partner in Hacking UI - and I decided to leave our jobs at Similarweb to work on Hacking UI full time.
19 Alternatives to Hacking UI

Freebiesbug

Collection of the best free web design resources.

Freebiesbug is a space where web developers and designers can find some free resources for their work. You can browse through a variety of high-quality fonts, PSDs, coding plugins and templates, and much more.

Forbes
One of the most clever shortcuts I've found as a creative entrepreneur is to use freebies. Whether you're prototyping a new website or designing a package for your product, you can find high-quality resources to help you speed up the process and get things done in a professional manner.
12 Alternatives to Freebiesbug
Discover your next favorite thing

Product Hunt surfaces the best new products, every day. It's a place for product-loving enthusiasts to share and geek out about the latest mobile apps, websites, hardware projects, and tech creations.