CircleCI is the best platform for software teams looking to rapidly build quality projects, at scale. Their intelligent continuous integration and delivery tools are simple yet powerful. Their aim is to provide the wisdom of a connected development ecosystem to every team member making technology decisions.
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.
Google Optimize is a free website optimization tool that helps online marketers increase visitor conversion rates and overall visitor satisfaction by continually A/B testing different combinations of website content.
Hypertext Markup Language (HTML) is the standard markup language for documents designed to be displayed in a web browser. It can be assisted by technologies such as Cascading Style Sheets (CSS) and scripting languages such as JavaScript.
Sumo is easy to install on any website or CMS, Sumo is a suite of free app-like tools for growing website traffic, email subscriber lists and monitoring engagement.