AIPRM
Adds a library of ready-made prompt templates to the ChatGPT interface for marketing, SEO, copywriting and other tasks.
Chrome extension
Saves, tags and searches your own library of prompts with fill-in variables, so you can reuse them quickly in ChatGPT and similar chat tools.
AI Prompt Genius lets you build and search your own library of prompts in Chrome and reuse them in ChatGPT and other chat tools. It is useful for people who keep retyping the same instructions and want them organized with tags, folders and fill-in variables.
Click the extension icon after installing to open your library, add prompts with tags or variables, and insert them into a chat tool when needed.
It stores and inserts prompts but does not include its own AI model, so you still need access to a chat service. The developer describes it as free and open source.