Markdown by DaringFireball - Text-to-HTML conversion tool/syntax for web writers, by John Gruber
MySQL - The world's most popular open source database
Characters - Characters makes it easy for writers, designers and developers to access special characters. They are easily found and copied to your clipboard, either as html code or as the character itself.
Datahike - A durable datalog database adaptable for distribution.
Qwik - The HTML-first framework. Initialize apps of any size with < 1kb JS
MarkLogic Server - MarkLogic Server is a multi-model database that has both NoSQL and trusted enterprise data management capabilities.