Programming

socket

python
nodejs
golang
java

web framework

python: flask
nodejs: express,koa
golang: gin
java: spring

Concurrency

python: threading
nodejs: workerPool
golang: goDefer
java: Thread / Runnable

Crawler

python: requests
nodejs: request
golang: http
java: URL

Serverless

vercel: python,nodejs,golang
openFaas: python,nodejs,golang,java
Kubeless: python,nodejs,golang,java
Knative: python,nodejs,golang,java

SSH

python: paramiko
nodejs: node-ssh
golang: crypto/ssh
java: sshj