Hookdeck - Hookdeck makes it simple to build and deploy reliable, testable, and debuggable applications that rely on webhooks.
Beeceptor - Unblock yourself from API dependencies, and build & integrate with APIs fast. Beeceptor helps you build a mock Rest API in a few seconds.
Slack It - A bookmarklet to share links in Slack with one click
MockServer - Easy mocking of any system you integrate with via HTTP or HTTPS.
Threado - Threado is the command centre for your online community. Measure engagement, get detailed insights and automate your operational tasks.
Webhook.site - Instantly generate a free, unique URL and email address to test, inspect, and automate (with a visual workflow editor and scripts) incoming HTTP requests and emails.