digiKam - Professional Photo Management with the Power of Open Source

Explorecams - Explorecams allows you to search through thousands of images that people taken on specific photo camera bodies & lenses.

Photos on macOS - Photos keeps your images organized and accessible. Rediscover favorite shots with Memories. Access them on your devices with iCloud Photos.

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.

XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!

Shutterstock - Shutterstock is a provider of stock photos, illustrations, and vector art. The website allows individuals to purchase a subscription and download copyrighted art for creative projects. Read more about Shutterstock.