Biggest player - shutterstock.com. Tiny fees, lots of sales, you need volume here. - Source: Reddit / about 5 hours ago
User Persona - To create the user persona I used InVision. I was able to find a few templates on their site and used one of those. I included a picture I got on pixabay.com. Use the information from the provided excel document to make up a fake person. You can submit this as a .png from InVision or I copied it into my word doc with my timeline. - Source: Reddit / about 2 months ago
If you ever want copyright free like music, videos, images or other stuff for your video you should use https://pixabay.com/. - Source: Reddit / about 1 month ago
(Background and foreground elements courtesy of https://pixabay.com). - Source: Reddit / 26 days ago
Someone mentioned yet another alternative which I have used previously but had completely forgotten https://pixabay.com. - Source: Hacker News / 21 days ago
Try building a collection of reference material that you find inspiring and that is legal for you to use. While it doesn't really matter for beginner practicing, it's just a good habit to only use images you have the rights to. Pixabay is a good place to get started. Search and browse categories and keywords you're interested in, and save anything that catches your eye. - Source: Reddit / 20 days ago
Unsplash - Unsplash is a website with high-quality free HD images. It has a catalog of more than three hundred thousand striking images that are neatly organized with tags. Read more about Unsplash.
Pexels - Find the best free stock images about Browser Home Page. Download all photos and use them even for commercial projects.
motosha - Real free high quality stock photos for commercial and private use! From selected professional photographers. Simple download without registration, without obligations. Best quality and 100% Free.
LibreStock - Librestock is a multisite search engine that scans and indexes the stock photos from 40+ different websites. We provide you with the biggest searchable database of high-quality free stock photos on the internet.
Freepik - More than a million free vectors, PSD, photos and free icons. Exclusive freebies and all graphic resources that you need for your projects
iStockphoto - Browse the best stock library of royalty free content at prices anyone can afford.