Some additional repos to consider:
zephir-ide-helper — Generate php code completion file from zephir file(.zep)
Php-BookStore — Domain driven + command pattern based application in PHP. Created to compare times between zephir https://github.com/dgafka/zephir-BookStore
ast2zephir — Generate Zephir code from PHP Abstract Syntax Tree
zephir2php — Convert Zephir source files to regular PHP
Once a week...... I send out a list of most interesting PHP libraries and apps.
Want to get it?