SunflowersLw Free AI Tools & Apps免费 AI 工具与应用.
Start for free — open-source, free tiers, and free downloads.免费起步——开源、免费档，以及免费下载。
AI products you can use without paying up front: an open-source MCP learning sidecar, a free browser-based English speaking partner, a free foldable-Android document renderer, and a campus ride board. Each links to its own site so you can start right away.无需预先付费即可使用的 AI 产品：一个开源的 MCP 学习边车、一个免费的、基于浏览器的英语口语伙伴、一个面向折叠屏 Android 的免费文档渲染器，以及一块校园拼车板。每个都链接到各自的站点，你可以马上开始。
covate
Dev Tool · MCP开发者工具 · MCPOpen-source MCP learning sidecar and persistent debugging memory for AI assistants.面向 AI 助手的开源 MCP 学习边车与持久化调试记忆。
- Quizzes you on your own AI-assisted changes when you ask在你提出时，就你自己的 AI 辅助代码改动出题考你
- Persistent debugging memory across coding sessions跨会话持久化记录调试思路与排错路径，避免重复踩坑
- MCP sidecar that plugs directly into Claude Code, Codex, and modern AI tools无缝接入 Claude Code、Codex 及标准 MCP 协议编程宿主
FluentDojo
Language · Voice语言 · 语音A real-time voice AI partner for spoken English, in the browser.浏览器里的实时语音 AI 英语口语搭档。
- Practice spoken English with an interactive AI voice partner any time随时与 AI 实时语音伙伴展开自由对话，无需预约外教
- Continuous voice conversation you can interrupt, with push-to-talk, typing, and live captions with translation随时打断的连续语音对话，支持按键说话、文字输入与带翻译的实时字幕
- After each call: fluency, grammar and vocabulary scores plus rewrites. Per-word pronunciation scores in read-aloud practice.通话后总评：流利度、语法、词汇打分与改写；发音评分在朗读练习里按单词给分
FoldRender
Android · Foldable安卓 · 折叠屏Native document renderer and on-device git client for mobile and foldable screens.面向移动端与折叠屏的原生文档渲染器与设备端 Git 客户端。
- Native renderer for the repo reader (not a WebView)仓库阅读器为原生渲染（不是 WebView）
- Unfolding foldable devices triggers pure relayout with zero reflow jank针对大折叠屏展开做纯重排优化，流畅无重绘卡顿
- On-device git: clone and pull (diff, commit and push are in the build, not yet verified end to end)端上 Git：克隆与拉取（差异、提交、推送已在包内，尚未完整验证）
APRide
Campus · Mobility校园 · 出行Campus carpool matching board built for APU students with verified school emails.为经学校邮箱验证的 APU 学生打造的校园拼车匹配板。
- Dedicated carpool board verified exclusively with campus institutional email强制校级教育邮箱验证，确保同乘人员身份真实可靠
- Post or join a ride between 8 fixed campus-area pickup points, up to 7 days ahead在 8 个固定集合点之间发布或加入拼车，最多提前 7 天
- No payments, drivers or fares: coordinate in Microsoft Teams平台不收款、没有司机和车费，在 Microsoft Teams 里联系
FAQ常见问题
What are the best free AI tools to try?最好的、值得一试的免费 AI 工具有哪些？
covate ships a free open-source MCP that quizzes you on your own code, FluentDojo lets you practice spoken English free in the browser, FoldRender is free on Google Play for foldable Android, and APRide is a campus ride-share board that is free to use (optional Premium).covate 提供一个免费的开源 MCP，就你自己的代码向你提问；FluentDojo 让你在浏览器里免费练习英语口语；FoldRender 在 Google Play 上面向折叠屏 Android 免费；APRide 是一块免费使用的校园拼车板（可选 Premium）。
Are these AI tools really free, or free trials?这些 AI 工具是真的免费，还是免费试用？
They start free: covate’s MCP sidecar is open-source, FluentDojo and APRide are free to use, and FoldRender is free on Google Play. APRide also has an optional Premium plan.它们起步免费：covate 的 MCP 边车是开源的，FluentDojo 和 APRide 免费使用，FoldRender 在 Google Play 上免费。APRide 还有一个可选的 Premium 方案。