Mailpit - email testing for developers
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Mailpit is a small, fast, low memory, zero-dependency, multi-platform email testing tool & API for developers.

It acts as an SMTP server, provides a modern web interface to view & test captured emails, and includes an API for automated integration testing.

Mailpit was originally inspired by MailHog which is no longer maintained and hasn't seen active development or security updates for a few years now.

ClickHouse Keeper: A ZooKeeper alternative written in C++
Tom Schreiber and Derek Chia
Sep 27, 2023 - 21 minutes read
Introduction

ClickHouse is the fastest and most resource-efficient open-source database for real-time applications and analytics. As one of its components, ClickHouse Keeper is a fast, more resource-efficient, and feature-rich alternative to ZooKeeper. This open-source component provides a highly reliable metadata store, as well as coordination and synchronization mechanisms. It was originally developed for use with ClickHouse when it is deployed as a distributed system in a self-managed setup or a hosted offering like CloudHouse Cloud. However, we believe that the broader community can benefit from this project in additional use cases.