Chariot Companies L.L.C. has big plans for Philadelphia’s working-class neighborhoods and a big budget to make them happen. The certified Community Development Entity has announced that it will invest $1 billion in projects–including the 1 million-square-foot Chariot Clean Energy Center and a 1,050-unit residential community dubbed Chariot Landing–designed to help revitalize underserved areas and put the city on the map as an energy leader.