In a recent web search, inspired by the thread here about a Devanagari font from Adobe, I came across this fascinating web site:

http://nordenx.blogspot.ca/2012_04_01_archive.html

In the 1600s and before, the writing system used in the Philippines for Tagalog was, like those of Thailand, Burma, and Tibet, an abugida derived, like Devanagari, from the ancient Brahmi script.

EDIT: My first search result was probably

http://istoryadista.blogspot.ca/2011/09/baybayin-way-of-writing-in-our-own.html

Another important site, with different fonts, is

http://www.mts.net/~pmorrow/bayeng1.htm