Stepforward

The Jupyter Notebook is an open-source web application that allows you to create and share documents that contain live code, equations, visualizations and explanatory text. Uses include: data cleaning and transformation, numerical simulation, statistical modeling, machine learning and much more.”

"BetaEasy Offers a community of users to test and provide feedback on websites, mobile applications and desktop applications. It also allows companies to communicate with users and react to their suggestions and provides detailed reports of all communications and progress".

"Topcoder is a crowdsourcing company with an open global community of designers, developers, data scientists, and competitive programmers. Topcoder pays community members for their work on the projects and sells community services to corporate, mid-size, and small-business clients".

"Software Testing services is a community of software testers who are passionate about quality and love to test. We develop an in-depth understanding of the applications under test and include software testing strategies that deliver quantifiable results. In short, we help in building incredible".

"Passbrains provides compatibility, functional, localization, load and performance, usability and security crowd testing. passbrains offers access to a private company-created crowd or a passbrains crowd, with testers selected based on numerous factors like skills and location".

"Mob4Hire By incorporating user feedback and in market testing to developers, we help make mobile software better. Mob4Hire significantly reduces mobile application testing costs and reduces time to market by connecting developers with eager, lower priced, crowd sourced testers and focus groups".