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Build web pages and command-line programs with a general-purpose scripting language and interpreter.

Explore data and create statistical summaries and graphics in R's language environment.

Use a compact scripting language on its own or embed its interpreter through a documented C API.

Explore an interpreted object-oriented language for web applications, scripts, and text-processing tasks.

Build type-safe concurrent programs for the Erlang virtual machine or compile them to JavaScript.

AI language tutor for speaking practice and pronunciation feedback.

A school English-language-arts library with texts, skills lessons and complete teaching units.

A collection of literacy programmes and teacher resources for children's reading and language learning.

Licensed manga reading, formerly called Azuki

Translate while reading and review the words afterward.

Printable reading, spelling, grammar and writing resources with subject and grade browsing.

Reading, listening, dictation and grammar practice across languages.

Write and annotate handwritten notes on Android with page layouts, linked notes, and PDF tools.

Go language, libraries and performance reading

Language learning through books, audio and movie excerpts.

Animated English stories with songs, games and tools for organising reading practice.

A compact selection of writing from around the web

A curated reading list about user-experience work

Searchable language lessons organized by level and modality.

Write statically typed Nim programs and compile them with a toolchain designed for systems and application work.

Build JVM and multiplatform applications with an open-source language and compiler toolchain.

Reading-comprehension practice with fiction, nonfiction and progress information for learners and teachers.

Game-based maths and reading with problems, explanations and teaching videos.

Share columnar in-memory data across languages with a common format and library ecosystem.