Dev-Pascal is a full-featured integrated development environment (IDE), which is able to create Windows or console-based Pascal programs using the Free Pascal or GNU Pascal compilers. It can also handle the Insight Debugger, which you can also download here.

Dev-Pascal Features
Pascal compiler for Win32 (Free Pascal or GNU Pascal)
Debugger (GDB or Insight)
Customizable syntax highlighting
Powerful multi-window editor with many options
Work in source file or project mode
Setup creator
Create console, windows and DLL programs
Resource file editing (menu creator...)
Project Manager, compiler, linker and resource results
nsert automatically Pascal codes and statements
Makefile automatic creation
2 different icon sets for menus and toolbars in Dev-Pascal
Tool manager
Templates for creating your own project types