Resend
Developer-first email API.
Marketing
Oskyla
Oskyla
@user-ad6380f090
871 sitesJoined 2026/10/19
Brevo
Email, SMS and marketing automation with free tier.
Marketing
Kit (ConvertKit)
Email marketing for creators (now Kit).
Marketing
Keyword Tool
Keyword ideas from Google, YouTube, Amazon autocomplete.
Marketing
Seobility
Site audit, rank tracking and backlink checks.
Marketing
Screaming Frog SEO Spider
Desktop crawler to audit technical SEO; free up to 500 URLs.
Marketing
Moz
SEO software plus the free Beginner's Guide to SEO.
Marketing
Lichess
Free, open-source, ad-free chess.
Learning
Chess.com
Play and learn chess with lessons and puzzles.
Learning
TypingClub
Free touch-typing lessons.
Learning
CNKI 中国知网
CNKI, China's main academic literature database.
Learning
Connected Papers
Visual graph of related academic papers.
Learning
Semantic Scholar
AI-powered research paper search.
Learning
arXiv
Open-access preprints in physics, CS, maths and more.
Learning
Google Scholar
Search scholarly papers and citations.
Learning
Zotero
Free reference manager for research and citations.
Learning
Eudic 欧路词典
Eudic online dictionary for English learners.
Learning
Shanbay 扇贝
Shanbay English vocabulary and reading practice.
Learning
XuetangX 学堂在线
XuetangX, Tsinghua's Chinese MOOC platform.
Learning
NTU OpenCourseWare 台大开放式课程
NTU OpenCourseWare from National Taiwan University.
Learning
3Blue1Brown
Beautifully animated maths explanations.
Learning
PhET Simulations
Free interactive science and maths simulations.
Learning
GeoGebra
Interactive maths for geometry, algebra and graphing.
Learning
Open Culture
Free courses, audiobooks, films and ebooks curated daily.
Learning