The PIE project, including the PIE schemes and Chrome browser extensions, is founded by Ziyuan Yao. The founder welcomes your participation. PIE is free and open-source software, licensed under a BSD License, and all source code is available here. Read the README file for how to use the source code files.
- CMU Pronouncing Dictionary provides American English pronunciation data which is revised and used by PIE.
- Moby Pronunciator II also provides American English pronunciation data which is revised and used by PIE. Moby also provides words whose meaning varies with pronunciation (heteronyms). PIE can optionally show a small plus sign after such words.
- The free font Cherry PIE shipped with and used by PIE is modified from Charis SIL which is produced by Summer Institute of Linguistics (SIL).
- The "pie" logo used in PIE is a public domain image created by "cgbug".
- Xueliang Wei helped to create a Chrome Web Store developer account.
- Łukasz Łoboda and Devin on the "Chromium-extensions" Google Group showed how to use Web fonts in a Chrome extension.
- Michel Boyer on Typophile.com showed a way to modify the Charis SIL font with free font editors FontForge and ttx, keeping the font's smart font data intact.
- Albert Filice from PCWorld found a bug in early versions of PIE that crashed browser tabs in Mac OS X, and helped to diagnose and fix the bug.
- Paul New offered many suggestions regarding PIE, leading to an American Edition of PIE and PIE's emphasis on weak pronunciation.
- AMcBain and kerozene in the FreeNode IRC chatroom #css provided knowledge to construct a complex css selector to apply a font to desired HTML elements.
- Shengyi Wang is the first tester of PIE on Mac OS X.