If you want to create pixel art from text prompts, Snowpixel is a good option that can generate pixel art along with other multimedia content from text prompts. It's got a lot of options, including video generation, image models and 3D objects, and uses a credit-based pricing system.
Another top option is getimg.ai, an AI service that specializes in generating original images from text prompts. It also offers tools for real-time image generation, image editing and creation of custom AI models, so it's a good option for both creatives and pros.
If you want more control, OpenArt offers a variety of AI art tools and editing options to turn text-to-image prompts into nice images. It's got options like boundary-free AI drawing and the ability to train your own models, so you can customize it to your needs.