Capability

Writing and Content

Drafting, editing, translating, summarising. Includes 5 subcategories: copywriting and marketing copy, long-form and editorial, editing and proofreading, translation and localisation, summarisation. Every listing is scored on the same axis so a Claude Skill, an MCP server, and a Cursor rule compare directly.

Indexed: 9
Avg score: 7.7
Top platform: Custom GPTs 4
Top industry: Education and EdTech 5

Awesome ChatGPT Prompts (prompts.chat)

The world's largest open-source prompt library — 143k+ starred collection of role-based prompts that work with ChatGPT, Claude, Gemini, Llama, and Mistral.

Writing and ContentFatih Kadir Akın

GPT

9.1

Nonprofit Grant Writer (Custom GPT)

Custom GPT that helps nonprofit administrators manage the grant-writing process end-to-end — funder research, proposal drafting, and reviewer prep.

Writing and ContentOpenAI GPT Store

GPT

8.6

Expert Grant Proposal Writer (with Canvas)

Custom GPT that drafts long-form grant proposals inside ChatGPT Canvas — section-by-section editing for needs statements, methods, and budgets.

Writing and ContentOpenAI GPT Store

9 skills

Make

7.8

Summarize Gmail With OpenAI, Send to Slack

Summarize every new Gmail message with OpenAI and post the digest to a Slack channel.

Writing and ContentMake

GPT

7.4

Creative Writing Coach

Reads your writing and gives feedback to help you improve your skills — an OpenAI-built writing GPT.

Writing and ContentOpenAI

GPT

7.3

Tutor Me by Khan Academy

Khan Academy's Khanmigo tutor as a GPT — asks guiding questions instead of giving answers away.

Writing and ContentKhan Academy

LangChain

7.2

AutoRFP (LlamaIndex)

Next.js + LlamaIndex platform that automates RFP responses — extracts questions from incoming documents and drafts contextual answers from a knowledge base.

Writing and Contentrun-llama

Make

6.4