Dropbox is an off-site server for file syncing, storage and sharing which allows users to save & share files of any format & access them anywhere, on any device.
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.
SendGrid cloud-based email infrastructure relieves businesses of the cost and complexity of maintaining custom email systems. SendGrid provides reliable email delivery, scalability and real-time analytics along with flexible API's that make custom integration a breeze.
Cap & Compass Business Intelligence And Analytics Technology
PHP: Hypertext Preprocessor is a server-side scripting language designed for Web development, but also used as a general-purpose programming language. PHP code may be embedded into HTML code, or it can be used in combination with various web template systems, web content management systems, and web frameworks.