About KotobaHoshi
Visual Vocabulary Learning — Every word has its own picture-book-style illustration.
JLPT N5–N1 Vocabulary — Explore over 7,800 Japanese words across five JLPT levels.
Japanese Audio — Listen to pronunciations for words and example sentences.
Contextual Examples — Learn how words are used in Japanese sentences.
Multilingual Support — Study with Japanese, English, or Chinese explanations.
Smart Spaced Repetition — Review vocabulary with FSRS-based scheduling.
Personal Word Collection — Save and revisit vocabulary you want to remember.
Similar to KotobaHoshi
Wordler
Wordler offers free daily word puzzles, unlimited guessing games, and interactive vocabulary challenges for word game fans.
Dot & Dash
Learn Morse code on a machine you can press. Write and send messages, turn Morse into text and back, and key Morse in any app on your Mac.
Bloom
An adaptive AI tutor that turns topics or your materials into courses, lessons, and answers tailored to how you learn.
PracticeNetworking
Master networking with interactive, hands-on practice directly in your browser. Solve real terminal challenges, debug routes, and build core IT skills
PythonExercise.com
An interactive coding platform featuring bite-sized Python exercises designed to build real coding skills through hands-on practice directly in your b
PracticeSIEM
PracticeSIEM.com is an interactive, browser-based hands-on cybersecurity learning platform designed for Security Operations Center (SOC) analysts.
SQLCrab
SQLCrab (sqlcrab.com) is an interactive, browser-based SQL learning platform that lets you practice database queries directly in your browser.
ChemAI Atlas
Explore AI models, agents, MCP servers, Skills, and open-source tools for chemistry. Discover practical guides and research workflow Recipes.