Updated project rules and guidelines and added project icon, thanks to 6LEGS2MANY. Now the project is open, and no invites are required, and all added observations must have coordinates to help with ID's. Hope this helps, everyone is welcome to the project!

BugGuide.net: http://bugguide.net/node/view/165
BugGuide.net is a digital guide for anyone to use for arthropod identification. It has experts in a variety of taxa, including ants. If you want an identification from experts, which can be sometimes fast than iNaturalist, go to "ID Request."

AntWeb: https://www.antweb.org/
Antweb is a more scientific website specializing in ants, which is similar to EOL. It has close up photos of the ants via microscope, and can be interesting to look at. The disadvantage is that ants look very different close up, and this website may be helpful if you don't have a microscope.

AntsCanada: http://www.antscanada.com/
Ant shop and youtube channel owned by Mikey Bustos, which has instructional videos and products.

GAN Project: http://www.antscanada.com/queen-ants-for-sale/
The Global Ant Nursery project is an international community of ant sellers locally. Unfortunately, to my knowledge you cannot get them out of region, and there are very few sellers.

Wikipedia Article: https://en.wikipedia.org/wiki/Ant-keeping
Medium-length Wikipedia article on Ant Keeping.

Ants Australia: https://antsaustralia.com/
Small YouTuber, photographer, and videographer based in Australia which keeps ants and recently open shop.