Productivity

53 tools reviewed

8.6
Using AI to Learn a New Language — 2026 Edition

AI has quietly become the best language tutor available. We tested ChatGPT Voice, Claude, Duolingo Max, Speak, and Language Reactor for real language learning — here's what actually works.

7.8
course2md Review 2026 — Turn YouTube, Bilibili or Lecture Recordings Into Slide-Illustrated Markdown Notes

course2md is a free MIT-licensed Rust CLI that turns YouTube, Bilibili or local course/meeting recordings into slide-illustrated Markdown and HTML lecture notes. It extracts keyframes with SSIM-based slide detection, transcribes audio with a choice of five ASR backends (Apple Silicon CoreML with Qwen3-ASR 0.6B, llama.cpp GPU/CPU with Qwen3-ASR 1.7B, cloud OpenAI-compatible STT via OpenRouter, and Intel NPU via OpenVINO Whisper), then assembles timestamped, slide-interleaved notes with an optional LLM proofreading and summarization stage. Benchmarked on Apple Silicon: 47s wall time at ~6.7W on the CoreML backend for a 3-minute lecture, 13s on GPU. This review covers the pipeline, backend trade-offs, the honest limitations (developer-grade install on Linux/Windows, first-run model downloads, cloud STT privacy), and who it's for.