REI3 is a platform for business applications as well as a low-code application builder. Address your requirements and optionally publish your solutions for others. REI3 is an open platform for business applications. Free to use and with no user-limit, anyone can run and create applications to easily address their software requirements. Many applications are already available for free to address common business requirements, such as tracking time, controlling access to passwords or managing projects. Running on REI3, all applications benefit from these features: * Runs anywhere: REI3 runs on Windows and Linux servers and on all modern browsers, with progressive web apps and mobile-optimized interfaces. * Fully turnkey on Windows: For busy admins, REI3 includes automatic backups and an integrated, self-managed database. * Ready to use: Professionally designed applications can be installed in seconds. * Full authorship: Everything you create is yours. Keep it, share it, sell it - your choice. * Easy to create: Build new applications in minutes with the integrated, graphical application builder - or the 'Builder' for short. * Powerful features for more complex applications: Gantt views, data access policies, date calculations, email processing, end-to-end encryption, PDF generation and much more.