FlowGPT is the leading community-driven AI prompt marketplace and chat platform in 2026, specializing in ChatGPT-style prompts, custom AI characters (including roleplay, AI girlfriend/boyfriend), and tools for productivity, coding, writing, and more. It features millions of user-shared prompts, free access to many models (GPT-4 free variants, Gemini), vibrant community discussions, and paid memberships for enhanced features/credits. Ideal for AI enthusiasts, creators, roleplayers, and professionals seeking optimized prompts and uncensored/creative chats.

AI Prompt Genius is a popular Chrome extension and web platform in 2026 for curating, managing, and using a custom library of AI prompts, primarily for ChatGPT and other LLMs. It features easy prompt saving, organization, sharing, search, themes/customization for ChatGPT interface, and community discovery of high-quality prompts. Free core extension with optional premium for advanced features—ideal for power users, content creators, developers, and anyone optimizing AI interactions daily.

PromptPerfect by Jina AI is the leading AI prompt optimizer and generator in 2026, specializing in refining prompts for LLMs like GPT-4, Claude, ChatGPT, and image models like Midjourney, DALL-E, Stable Diffusion. It features auto-tune, interactive assistant, arena comparison, prompt hosting/API deployment, and agents for superior results in text, image, coding, and marketing. Free forever tier available with paid subscriptions starting low for unlimited access—ideal for prompt engineers, content creators, developers, and AI power users seeking better outputs faster.

PublicPrompts.art is a free community-driven AI prompt library and resource hub in 2026, featuring thousands of high-quality prompts for ChatGPT, Claude, Stable Diffusion, Midjourney, and more. It covers AI art, writing, coding, creative projects with categorized examples like comic art, hyper-realistic anime, isometric rooms, cute creatures. Fully free to browse/share, ideal for beginners and pros seeking inspiration and ready-to-use prompts for generative AI tools.

PromptFolder is a user-friendly AI prompt manager in 2026 for ChatGPT, Midjourney, and other AI tools, allowing users to build, save, organize, and discover prompts in folders with a Chrome extension for seamless integration. It features trending prompt browsing, Midjourney/ChatGPT helpers, and affordable plans (freemium with paid upgrades). Ideal for content creators, marketers, and AI enthusiasts seeking efficient prompt organization and reuse.

Baidu AI Studio (飞桨AI Studio星河社区) is Baidu's comprehensive online AI development and learning platform in 2026, built around the ERNIE (Wenxin Yiyan) series of large models. It supports model training, fine-tuning, application development, courses, competitions, datasets, and community collaboration for text, multimodal (image/video), code, and agent tasks. Free access with generous token quotas, ideal for developers, students, and enterprises exploring Chinese-optimized AI.

Pretty Prompt is a slick Chrome extension in 2026 acting as "Grammarly for prompting"—one-click refines your rough ideas into clear, structured, high-quality prompts for ChatGPT, Claude, Gemini, and more. It adds context, removes ambiguity, breaks into editable blocks (Prompt Blocks), saves history across tools, supports custom tones/styles, and includes a growing prompt library. No extra logins needed, works right in the textbox—saves time, reduces revisions, and boosts AI output quality for writers, marketers, devs, students, and everyday users. Free tier with limits; Pro unlocks unlimited.

AstroChart.ai is your pocket AI astrologer in 2026—generating instant personalized birth charts, horoscopes, and deep insights across Western, Vedic, Chinese, Human Design, AstroCartography, and Numerology. Chat with an AI guide for real-time answers on love, career, self-growth; track friends/partners' transits; get daily updates in 90+ languages. Community vibe with 5k+ seekers; free to start, no heavy paywall mentioned—ideal for curious beginners, spiritual explorers, or anyone wanting cosmic clarity without booking a pro astrologer.

TestYourIdea.app is a fast startup idea validator in 2026 that scans your concept in ~60 seconds using 11 live sources (Reddit, Indie Hackers, HN, PH, Google Trends, etc.) to uncover real problems, risks, competitors, market realities, and fixes—before you build. Get a Weak Spot Score (0-100), ranked issues (e.g., "Easy to copy 6.4/10"), source-backed insights, competitor intel, TAM/SAM/SOM estimates, and a Fix Playbook. Free shows problems; paid ($19 one-time) unlocks solutions, AI Pivot Coach, and more. Ideal for solo founders & early teams avoiding wasted builds—real data over AI guesses.

Promptessor is a smart AI prompt analysis and optimization tool in 2026, helping users craft better prompts for any LLM. It scores prompts (0-100), breaks down metrics like clarity/specificity/structure, suggests optimized variations, identifies strengths/weaknesses, and offers quick wins + implementation guides. Advanced mode adds deep 6-metric scoring, reverse engineering from images/text/URLs/videos, multilingual support, history saving, and feedback refinement. Great for anyone tired of trial-and-error prompting—content creators, devs, marketers—who want consistent, high-quality AI outputs faster.