Node

Support for Express and Koa.

PHP

Support for Monolog, Laravel, and Symfony.

Ruby

Support for Rails and Sinatra.

Go

Integration with the native net/http module.

Cocoa

Support for tvOS, macOS and iOS Objective-C and Swift.

Android

Client available on Maven Central.

Kotlin

Client available on Maven Central.

Scala

Client available on Maven Central.

.Net

Support for .Net and C#.

Perl

Client available on CPAN.

Elixir

Client available via Hex.