​httpx - a fast and multi-purpose HTTP toolkit allows to run multiple probers using retryablehttp library, it is designed to maintain the result reliability with increased threads.
Mocks & webhooks
​mocky - the world easiest & fastest tool belts to mock your APIs.
​Webhook.site - easily test HTTP webhooks with this handy tool that displays requests instantly.
Reverse proxy & simple server
​Reproxy - a simple edge HTTP(s) server / reverse proxy supporting various providers (docker, static, file).
Upload & download
​httpsweet - an HTTP server to easily download and upload files.
​QueenSono - Golang binary for data exfiltration with ICMP protocol.