Justifying social media costs isn't easy. Not everyone can afford paying a monthly subscription for quality images. Luckily, you don't have to. 

Here's a quick list of resources to develop your visual brand for free.
 

FREE PHOTO RESOURCES

deathtothestockphoto.com
www.creationswap.com
www.morguefile.com
unsplash.com
thestocks.im
 

FREE PHOTO EDITOR RESOURCES

Gimp GNU - Windows, Mac, Linux
Affinity Photo - Mac
Pixlr Editor - Chrome