http://haxe.org/doc

http://github.com/scriptor/pharen

http://www.mathgladiator.com/projects/kira/

http://www.scriptol.net/

http://sunra.nachtkabarett.com/

http://users.xelent.net/mlewis/tellpdf.php?seid=12457c30afd9...

http://ialexi.com/portfolio/original-works/components/quirk/

And a somewhat related list:

https://github.com/ryantenney/php7 Hacking the PHP compiler and standard libraries in the name of turning it into a not crappy language.

https://github.com/tenderlove/phuby Phuby wraps PHP in a loving embrace. Exposes a PHP runtime in ruby

https://code.google.com/p/japha/ implementation of the Java 1.4.2 library in PHP

https://github.com/lunant/lisphp Lisphp is a Lisp dialect written in PHP

https://code.google.com/p/php-alternative-syntax/ Scala inspired syntax for PHP

https://code.google.com/p/java-php-toolkit/ a cross language compiler than transforms java code to php code deployable on any server supporting PHP >= 5.3

https://github.com/bendemott/pyhp Pyhp is a way to execute PHP Source Code directly within Python Scripts

https://github.com/ramen/phply PHP parser written in Python using PLY

https://github.com/skeltoac/php_app A PHP eval server for Erlang/OTP