Dark Language - Holistic language, editor, and infra for building backends
Stein - Use Google Sheets as your no-setup database
Zukitwo - Zukitwo is a Gnome Shell and GTK theme that currently works on Gnome Shell 3.14 and the latest version of GTK.
Tabletop.js - Easily use Google Spreadsheets in JavaScript
Materia - Materia is a development environment to build advanced mobile and web applications.
CalcFusion - CalcFusion enables users to transform Spreadsheets into APIs that can be plugged into any IT system.