RulesManager is a UI library that allows you to manage conditional formatting rules at runtime. It has easy to use API that allows you to add conditional formatting easily through code. With Excel like conditional formatting UI, RulesManager can be attached to any data aware control such as FlexGrid, DataGrid or FlexChart to provide complete runtime conditional formatting management. It has an expression parser and formula editor that can evaluate any formula that returns true or false. In addition, it supports colors, data bars, gradients for formatting cells based on rules.