The Apache Project is an effort to develop and maintain an open-source HTTP server for modern operating systems including UNIX and Windows. The goal of this project is to provide a secure, efficient and extensible server that provides HTTP services in sync with the current HTTP standards.
Bandwidth offers a suite of API products for businesses and developers wanting to add voice calling, secured 2FA text messaging (SMS), MMS or 9-1-1 emergency call connectivity to software and applications, while also accessing SIP trunking, routing, address verification and number porting services.
Gmail is a free, advertising-supported email service offered as part of Google's G Suite, with 15GB of storage, color-coded inbox filters and unsend button.