Prompts.ai provides a playground similar to the GPT-3 Playground, but with some added features. It is no longer being developed.
In particular, Prompts.ai provides tooling for simulataneous completions of different prompts, multiple completions from the same prompt, and a conversation feature.
Sander Schulhoff is the Founder of Learn Prompting and an ML Researcher at the University of Maryland. He created the first open-source Prompt Engineering guide, reaching 3M+ people and teaching them to use tools like ChatGPT. Sander also led a team behind Prompt Report, the most comprehensive study of prompting ever done, co-authored with researchers from the University of Maryland, OpenAI, Microsoft, Google, Princeton, Stanford, and other leading institutions. This 76-page survey analyzed 1,500+ academic papers and covered 200+ prompting techniques.