Open source
Mailpit
Local SMTP server and web inbox for testing outgoing email
Developer ToolsEmail and SMTP testing tool
12 tools like Gatus, chosen by what they do. About Gatus

Local SMTP server and web inbox for testing outgoing email


Open source search engine with typo tolerance and vector search

Web tool for administering MySQL and MariaDB databases

Visual editor for SQLite and SQLCipher database files

Get alerts when web pages change, including price and stock


Get alerted when cron jobs and scheduled tasks miss their run


Uptime, API, browser and real user monitoring with status pages

External uptime, SSL, domain and page speed monitoring

Uptime monitoring, status pages and on-call in one place