GPTinf

QuillBot is an AI writing suite best known for its paraphrasing tool. Users paste or type text and have it rewritten in different tones and styles, while companion tools handle grammar checking, summarizing, citations, plagiarism checks and AI content detection. It is widely used by students, writers and professionals.

由 ChatGPT 驱动的 iPhone、iPad 与 Mac 语法、改写与翻译助手

Viinyx AI is an all-in-one AI browser extension sold through Gumroad as a one-time lifetime Premium purchase. It embeds multiple large language models into any website so you can write, rewrite, summarize and paint with AI from a sidebar or inline prompt, using your own provider API keys.

免费在线 AI 文本人性化工具，让 AI 文字读起来更自然

集学术校对、查重与 AI 写作工具于一体

让 AI 文本更像人写，并可检测真人程度

把AI生成文本改写成像真人写作一样自然

为幻灯片、表格、图像、视频、设计与写作而生的全能 AI 工作空间

既是语法检查器，也是写作技艺教练

Jenni is an AI research and academic writing workspace that helps students, researchers, and academics read, write, and cite in one place. Bring in PDFs or import a Zotero or Mendeley library, and Jenni's autocomplete suggests sentences grounded in your own sources, with every suggestion linked to the exact page and paragraph. A built-in writer, AI chat, citation engine covering 10,000+ styles, and a Reviews tool for catching weak or unverified claims make it a full environment for producing cited papers.

一站式在线 PDF 编辑器，内置 AI 助手帮你阅读、总结与生成文档

Phrasly is an AI writing suite built around a humanizer and detector pairing: it rewrites AI-generated drafts into more natural prose, then checks the result, alongside an AI writer, plagiarism checker, document editor, translator and chatbot.