If you want an AI-powered tool to turn text prompts into icons, IconKit is a good choice. It can generate high-quality, customizable icons in less than a minute. The tool's interface is designed to let you fine-tune colors and styles to match your brand, and it's geared for businesses and side projects. IconKit uses a credit system for pricing, with lifetime credits included, so it can be economical if you use it a lot.
Another good option is Appicons, which is geared specifically for generating app icons for iOS and Android that look professional. It uses AI to refine prompts with GPT AI and can be extended with the Photopea image editing tool. Appicons has a few different pricing tiers for different needs, including commercial use, so it's a good choice for developers who need high-resolution icons and want them as quickly and easily as possible.
If you need a more complete design kit, Icons8 has a range of tools and assets. It's got a large library of icons in different styles and formats, as well as AI tools like the Iconizer for editing SVG icons and a Smart Upscaler for increasing resolution. Icons8 also offers integrations with common design tools and APIs so you can use it in other apps.