Here are links to A.I. image generation websites that I've been sitting on for a while. I figured I'd share them with everybody here. 

Playground AI - https://playgroundai.com/   Has three free models, Playground Version 1 (Default model), Stable Diffusion 1.5 and Stable Diffusion 2.1. Paid model is DALL-E 2. Plenty of image generation options. Sign up for free.

Open Art - https://openart.ai/discovery   Just like Playground, has free models and the paid model is DALL-E 2. Default model is OpenArt Creative. Lots of free credits available.

Dezgo - https://dezgo.com/   Not very well known but this also has a fair number of models to choose from. Completely free, no account required. 

Orignal Stable Diffusion Demo - https://huggingface.co/spaces/stabilityai/stable-diffusion  Completely free to use.

Mage Space - https://www.mage.space/  Free to use but I'd recommend signing up. Two models available, Stable Diffusion 1.5 and Stable Diffusion 2.1. There are other models available but you have to pay to use them. 

Lexica - https://lexica.art/  This started off as an image search website but they've added the ability to generate your own images. Click on the "Generate" link to do that. It's free to sign up. There are two models available, Aperture V2 and Aperture V3. Click on advanced settings to choose the model you want. You can also manually adjust the dimensions of your image before you generate it. 

Versatile Diffusion - https://huggingface.co/spaces/shi-labs/Versatile-Diffusion  Free to use with lots of functions. More information is on the website.

Karlo - https://huggingface.co/spaces/kakaobrain/karlo  Free to use and based on the DALL-E 2 technique.

Protogen - https://huggingface.co/spaces/darkstorm2150/Stable-Diffusion-Protogen-x3.4-webui  Free to use and based on the Protogen model.

Instant Art - https://instantart.io/  Free to use but it works better with an account. Click on the "Generate" link. It has many models to choose from. The only problem is sometimes the website can be a little inconsistent and slow at times. 

Picfinder - https://picfinder.ai/  When you first land on the website it looks like it's an image search site but what this website does when you enter what you're searching for is to generate images at a very fast rate. Free to use. The default model is okay but if you click on the settings link you'll get access to other models you can use instead along with the aspect ratio if you want to change that.

Skybox - https://skybox.blockadelabs.com/  Free but you can sign up for an account. This is for creating landscapes that you can virtually move around in. Very addictive.  I mentioned this website before in a previous thread.

Vintedois Diffusion - https://replicate.com/22-hours/vintedois-diffusion  Free to use. This uses the Vintedois model which is more of a "painterly" type of model. 

Clipdrop - https://clipdrop.co/  Free to use but you can sign up. This is more focused on tools to use with Stable Diffusion but you can use text to image. Click on the "Tools" dropdown menu and select "Stable Diffusion XL" The other tools are really nice to use as well. 

Catbird - https://www.catbird.ai/  Like Dezgo, another not very well known website. it's another Free to use site but it's better with an account. The neat thing about this is the fact that you can generate lots of images using different models at once. Once you're signed in, click on the "Customize Models" drop down and you can select which models and how many images you want to generate. 

Diffusion Art - https://diffusionart.co/  Free to use. This is basically a front end for models that are on the Hugging Face website. 

Fusion Brain - https://fusionbrain.ai/en/  Free to use. This is unique in the fact that it doesn't use any Stable Diffusion models, rather it has its own uniquely trained model which has a very distinct and different look. On the bottom left side of the website you'll see a menu that has different style settings that you can choose. Because the look is so distinctive you'll either like it or you'll choose instead to stick with the Stable Diffusion models available on the other websites. 

Wombo - https://dream.ai/create  Of course we can't forget good old Wombo. This was the first A.I. image generator I used on a regular basis and I still check it out from time to time. It has many free models as well as some paid ones. 

Most of these websites have pros and cons to them but they're all usable for the images you want to create. If you have any A.I. image generation websites that I've missed, let me know, tell me a bit about them and I'll add them to the list.