• Still free of charge!
• Build complex regular expressions by selecting components from a palette
• Test expressions against real or sample input data
• Display all matches in a tree structure, showing captured groups, and all captures within a group
• Build replacement strings and test the match and replace functionality
• Highlight matched text in the input data
• Test automatically for syntax errors
• Generate Visual Basic or C# code
• Save and restore data in a project file
• Maintain and expand a library of frequently used regular expressions

Here are some of the additional features available in Expresso 2.x

• Expresso Analyzer interprets and diagrams a regular expression to aid in understanding and debugging
• Analyzer produces an English description of the expression that can be automatically incorporated into comments in the generated code
• Improvements to the user interface
• New "Partial Match" and "Exclude Match" enable testing selected portions of a regular expression to aid in debugging
• Code generation now supports Managed C++
• More extensive options for customizing the generated code
• Multithreaded operation allows interruption of time-consuming matches
• Performance tester for timing optimization
• Improvements and added features in the Expression Builder
• More extensive Help features
• Built-in regular expression tutorial
• Improvements to the Expression Library