Lazarus is a RAD Object Pascal Development IDE for use with Free Pascal. It is the open source equivalent of the Delphi VCL, designed to be widget-independent and to work on any platform where Free Pascal can be found.
In this major release, the IDE has many source editor improvements like display of "double width" fonts (such as Eastern, Japanese, Chinese, and Arabic), better code folding, highlighting, syncro editing, and persistent blocks. The debugger has assembler windows, easier exception handling, and breakpoint properties. The LCL now uses GTK2 as the default widgetset on Linux and BSD and includes the TMonitor class for multi-monitor support. Refactoring of LCL reduced the minimum size of executables by about 15%. The support of TFrame support has improved, so you can visually nest designers in the IDE.