Question: Is there a platform that offers a library of user-contributed filters and editing tools for both casual and professional photographers?

If you're looking for a platform with a library of user-generated filters and editing tools, Polarr is a good option. It has advanced AI-powered tools and a big library of user-generated filters, so it's good for both casual and serious photographers. With a range of editing tools like advanced adjustments, masks and layers, Polarr has a lot of room for creative editing on the web and mobile.

Another good option is Pho.to, a family of mobile photo editing tools that use AI to make photo editing easier. It includes tools like Photo Lab with more than 1000 effects, Emolfi to detect emotions, and Visage Lab to automatically retouch faces. The collection is geared for a broad range of users, from casual to pro, and is designed to make photo editing easy and accessible.

Fotor is another good option, with a full-featured online photo editor that uses AI for one-click photo optimization and background removal. It also comes with a big library of presets and filters, so it's good for pros and amateurs. And it's got multi-device support, so you can use it on whatever device you have handy.

For those who want industry-standard tools, Adobe Photoshop offers a powerful image editing foundation that combines traditional methods with the latest AI technology. It's geared for photographers and graphic designers of all skill levels, with features like background removal, compositing and one-click photo editing. Photoshop is available through various subscription plans, including a free trial, so it's a good option for both casual and pro users.