Node.js  

nodejs.org

Duolingo    

duolingo.com

Java  

Python  

python.org

ASP.NET  

asp.net

ASP.NET Core  

github.com

Rosetta Stone        

rosettastone.com

TypeScript  

typescriptlang.org

Go  

go.dev

PyTorch  

pytorch.org

LinguaTrip    

linguatrip.com

Kotlin  

kotlinlang.org

PHP  

php.net

Swift Language    

swift.org

Elixir  

elixir-lang.org

Scala  

scala-lang.org

Elm  

elm-lang.org

Lionbridge          

lionbridge.com

Julia  

julialang.org

Haskell  

haskell.org

Racket  

racket-lang.org

Lua  

lua.org

SnapTravel  

snaptravel.com

Hackr.io  

hackr.io

Berlitz        

berlitz.com

Ferrous Systems  

ferrous-systems.com

Solidity  

soliditylang.org

Perl  

nference  

nference.ai

Stylus  

stylus-lang.com

1-Stop Asia

1stopasia.com

4Dem.it

4dem.it

Able Translations

abletranslations.com

Ada (programming)

ada-lang.io

SPARK (programming)

learn.adacore.com

AdaCore      

adacore.com

Alire

alire.ada.dev

Armorblox      

armorblox.com

Artoo

artoo.io

Babbel

babbel.com

Barons English

baronsenglish.co.uk

Basic (programming) defunct

BBC Learning English

bbc.co.uk

Best Teacher

areyoubt.com

Bilingual Source

bilingualsource.com

Break Into English

englishclassviaskype.com

C (programming)

cprogramming.com

ChatLingual

chatlingual.com

CIDMA

cidma.ca

Clang

clang.llvm.org

Clojure

clojure.org

Cloudwords

cloudwords.com

Cobalt

cobaltspeech.com

CocoaPods

cocoapods.org

Codon

docs.exaloop.io

CoffeeScript

coffeescript.org

C++

isocpp.org

crates.io  

crates.io

Crystal language (programming)

crystal-lang.org

C#

D

dlang.org

Dart

dart.dev

DeepL

deepl.com

Delphi defunct

delphionline.eu

Descript

descript.com

Dialogflow

cloud.google.com

DuckDuckGo Community Platform

duck.co

EF Education

Ellevation  

ellevationeducation.com

ELLLO

elllo.org

English Ninjas

Englishpage.com

englishpage.com

F#

Fairchild TV

First Future

digitefl.com

FluentExpress

fluent.express

Fluenz

fluenz.com

FORTRAN defunct

ibm.com

Forvo

forvo.com

Gengo

gengo.com

Gensim

Ginseng English

ginsengenglish.com

Globus Swift

swift-lang.org

Google Translate

translate.google.com

GraphQL

graphql.org

Helen Doron

helendoron.com

Hellokid

hellokid.com

HelloTalk

hellotalk.com

Hugo English

hugoenglish.com

I Kinda Like Languages

ikindalikelanguages.com

Idris

idris-lang.org

ieLanguages

ielanguages.com

Imba

imba.io

Kaifu English

kaifuenglish.com

Kaplan International English

kaplaninternational.com

KK Talkee

kktalkee.com

Koalas defunct

Lang-8 defunct

lang-8.com

LanguageLine

LCF Clubs

lcfclubs.com

Learntalk

learntalk.org

LESS

lesscss.org

Lingo Kids

usingenglish.com

Linguanaut

linguanaut.com

Linguee,

linguee.com

Lisp

lisp-lang.org

Liulishuo

liulishuo.com

Living Language

livinglanguage.com

Mango Languages

mangolanguages.com

MarketMuse

marketmuse.com

MicroPython  

micropython.org

Microsoft Mobius defunct

Midjourney

midjourney.com

Modula-2

modula2.org

MSBuild

docs.microsoft.com

Multiglot

repetitoronline.com

Mustache

mustache.github.io

MyEcom

myecom.net

Natural Language Toolkit

nltk.org

Nglish

nglish.com

Nuance

nuance.com

Object Pascal defunct

OmniSharp

omnisharp.net

One Hour Translation

onehourtranslation.com

OpenJDK

openjdk.org

Panda ABC

pdabc.com

Pandarow

pandarow.com

Pimsleur

pimsleur.com

Polyglots

polyglots.ca

pug

pugjs.org

Py4J

py4j.org

PySpark

pypi.org

Pytrends

pypi.org

Qrithm

qrithm.com

Qt

qt.io

R

r-project.org

ReactiveX

reactivex.io

Real English

real-english.com

Rev  

rev.com

Rev.ai

rev.ai

Rocket Languages

rocketlanguages.com

Rosette

rosette.com

Roslyn

github.com

Ruby

ruby-lang.org

Rust (programming)  

rust-lang.org

Rype

rypeapp.com

Scratch

scratch.mit.edu

Skritter

skritter.com

Skyeng

en.skyeng.ru

Solid

solidproject.org

Speak Languages

speaklanguages.co.uk

Stepes

stepes.com

ThoughtCo.

thoughtco.com

Tilde

tilde.com

Tool Command Language

tcl.tk

Toucan

jointoucan.com

Trados

trados.com

Transcribe

transcribe.wreally.com

Transifex*

transifex.com

Translate.com

translate.com

TranslationPal

translationpal.com

Ulatus

ulatus.com

Unbabel

unbabel.com

Using English

usingenglish.com

uTalk

V2US defunct

Visual Basic

docs.microsoft.com

VivaLing

vivaling.com

VocoVision

Voxy

voxy.com

WorldLingo

worldlingo.com

Wysdom  

wysdom.ai

YAML

yaml.org