DemoBook is a catalog of real software demos cut into short, task-level clips. Watch the AI tools everyone's using actually work — by use case, product, or profession.

We built LumenAI to solve a single problem: NotebookLM doesn't have real chat functionality. Upload your entire collection of PDFs and documents, ask questions, explore connections, and dive deep through natural, continuous conversations that actually remember your context. Unlike NotebookLM's fragmented one-chat-per-notebook design, LumenAI delivers genuine multi-threaded discussions with seamless continuity across your entire research project.

Convert any YouTube, MP3, MP4, or PDF into transcripts, summaries with 99% accuracy, mindmaps, or quizzes. Use the integrated AI chat to search your documents instantly.

Zentor AI assistant is a cross-tool productivity workspace that connects to the apps people already use to handle recurring knowledge work. It is designed for solo founders, freelancers, students, creators, marketers, sales teams, managers, recruiters, consultants, and developers who want an AI assistant that can act inside their tools rather than only provide chat responses. Zentor connects with Notion, Airtable, Slack, Discord, Gmail, Google Drive, Google Calendar, Google Tasks, and Outlook. Users can summarize sales activity, check inventory and supplier lead times, draft invoice follow-ups, create tailored resumes and cover letters, update application trackers, schedule reminders, search content libraries, prepare responses, and produce ready-to-use documents, images, and presentations. Its persistent workspace memory stores preferred formats, tone, and repeat workflows, while integrations support AI automation across email, documents, spreadsheets, messaging, research, scheduling, and content operations. Zentor reduces manual coordination by completing work in the systems where it belongs, instead of making users copy answers between separate AI chats and business apps. Its memory can be exported or deleted and is designed to remain portable across AI models, providing a practical alternative to isolated assistants and fixed-rule automation tools. Zentor is available as a paid web workspace with a monthly subscription and usage credits.

Peptide Library is a peptide research companion for iOS, Android and the web. Browse 200+ peptide research profiles, work out reconstitution and syringe units with the calculator, log doses and schedules in the tracker, keep track of vials and run-out dates in inventory, and compare vendors by price per mg. Free to use, with Pro from $4.99/month.

KAI · 开gptAI（kaigpt.ai）是独立第三方 ChatGPT Plus 代充服务，与 OpenAI 无隶属关系。支付宝扫码付款，为你自己的 ChatGPT 账号开通 Plus 或 Pro 5 倍版；支付确认并完成页面要求的提交后，常规订单通常 1–5 分钟完成。不索取密码和验证码，Session 只在 KAI 自有兑换页 kaigpt.pro 提交；因平台或履约原因无法开通的订单，核实后通过原支付宝交易全额退款。