Drools
Drools is an open-source business rule management system that provides solutions to companies with a forward and backward chaining interference-based of a rules engine. It is a java enterprise level that consists of a UI-user interface, business layer, and a service layer connecting to the database.
The platform is a rule engine that uses the rule-based approach to an expert system. Drools help in the creation of the rule files and the production of the working memory. This system thus uses the knowledge to process it and use it for reasoning purposes.
The rule engine that Drools uses allows the user to decide what to do instead of how to do it. It helps the user of the applications to integrate business logic comprehensively. The approach used by Drools is the knowledge-based approach that allows the user to set the rules, process it, store, and re-use the rules.
#1 AppSheet
AppSheet is a mobile application creation solution that allows anyone to build a powerful mobile app for iOS and Android devices directly from their data source. All the data can be extracted from several sources, including Dropbox, Box, Google Drive, and many other platforms.
Once the app is created, the user can able to easily customize that branding and features offered with the fully interactive emulator to preview the app. The best thing about this solution is that it provides both a basic editor and an advanced editor for app customizations that make it better than others.
Its basic editor covers the most basic and vital application features and functions, including app logo, name and security level, etc. The advanced editor includes tools to adjust editing permissions, add multiple spreadsheets, select data views, specific data filters, add icons, etc.
It also offers a simple drag and drop interface to create and customize the app. AppSheet uniquely created by a professional team and includes all the core functionality that helps users to create a feature-rich business app. The core feature includes API, customizable branding, barcode scanner, custom form, offline access, signature capture, unlimited customization, etc.