This is a collection of places suggested by our writers to get free photos and fonts without running into copyright issues:
Fonts:
1001 Fonts
My go-to for fonts. –Voss Foster
FontSquirrel
“Font squirrel is nice since all their fonts are free for commercial use.” –Ashavan Doyon
Fontstruct
“If I can’t find what I want at 1000fonts, I go here.” –Voss Foster
Free Images
Canva.com
“Canva.com has a fair amount of free content and a lot of inexpensive graphics – Poppy Dennison at Dreamspinner suggested it.” –Scott
“I’ve recently discovered canva and I’m in love 
I made some cute promo graphics to send with my signed paperbacks as bookmarks” –LA Watson
Dart Creations
–Lina Duarte-Aristizabal
Depositphotos (paid images)
“Depositphotos has always been my favourite.” –Matt Bright
FreeImages.com
–-Dani Myrick
“useful at times (but make sure you’re looking at the free/ not paid results on results pages).” –Trevor Barton
Morgue File
–Dani Myrick
Nasa Images
“NASA has all kinds of resources. I actually discovered this at a con, where they had a table of awesome swag. Everyone kept asking about prices. They said, “It’s all free. You already paid for this with your tax dollars! Now go vote for expanding NASA’s budget.” :D The cover of my poetry collection Prismatica uses a NASA nebula photo.” –Elizabeth Barrette
Nasa Images II
–-Dani Myrick
PD Clipart
–-Dani Myrick
Pikwizard
Most photos are free to use. “Sponsored: photos have a cost, and are marked as “premium” content.
Pixabay.com
“Pixabay is amazing – and all free!” –Chris Quinton
“I have been using pixabay.com as the images are CC0 and of the dozen images I have done reverse image searches on, not one has come back as anything but.” –Tory Phoenix
Public Domain Pictures
–-Dani Myrick
Stock Arch
–Dani Myrick
Stock Vault
–Dani Myrick
Wikipedia List of Public Domain Image Sites
“Big list of public domain sites.” –Elizabeth Barrette
Unsplash.com
“My favorite.” –Lina Duarte-Aristizabal
“The first place I look for stock photos.” –KI Whitestar
Paid Images
123rf
“My favorite of the stock photo paid sites.” –Scott
Appsumo
“Every year they do a deal to get 100 image credits for deposit photos for 40 dollars which is crazy crazy cheap. As a cover designer by trade I usually buy about ten every time it comes around!” –Matt Bright
Bigstock Photo
–Dani Myrick
Canva.com
“Canva.com has a fair amount of free content and a lot of inexpensive graphics – Poppy Dennison at Dreamspinner suggested it.” –Scott
Depositphotos
“Depositphotos has always been my favourite.” –Matt Bright
Dreamstime
–Dani Myrick
Getty Images
–Dani Myrick
Graphic Stock
“Subscription based fees, rather than a one-time fee.” –Dani Myrick
I Stock Photo
–Dani Myrick
Shutterstock
–Dani Myrick
“For my three self-pubbed titles, I bought my images from Shutterstock.” –Nicola Markus
Dani Myrick’s advice on photo sites:
Please read the terms of service before using these sites. Even if they are free to use, many of them require–or at least want–credit/attribution, which I think is totally reasonable.
Also, if you are using images related to LGBTQ themes (book covers, promotional graphics, etc.), be especially careful with the terms of service when using stock depicting models. For example, from Dreamstime ToS about “sensitive subjects”: You are solely responsible for the use of any Media in combination with any other material, and you agree not to use Media with sensitive topics without Dreamstime`s separate written agreement. Such sensitive topics include, but are not limited to: models with mental or physical health issues, social issues, sexual activity, sexual orientation or related, substance abuse, crime or other subjects that can be considered to be offensive or unflattering to any of the models included in the image. You must contact Dreamstime for additional information prior to any use of an Media with any sensitive topic.
For those looking for great stock photos for book covers (and have some cash to spend on it), check out http://novelexpression.com/book-cover-images for some great high-quality romance images (they have M/M and F/F couples available now).
If you’re new to all this and are confused about terms such as copyright, royalty free, public domain, etc., check out https://goo.gl/NM3m9G which defines all of them clearly.