SynEdit is an advanced multi-line edit control, for Borland Delphi and Kylix (C++Builder mostly works, but is unsupported). It supports syntax highlighting and word-wrap, and it includes code completion and templates components, and exporters for html, tex and rtf.

It is a pure-VCL/CLX control, meaning it is not a wrapper for Microsoft Windows controls and so no run-time library is required.

Compatibility with FreePascal/Lazarus is planned, and the editor in the Lazarus IDE is indeed a SynEdit-port, but based on the 1.1 version and with some additions.

SynEdit is packaged together with highlighter components which are used to syntax highlight many programming languages source code.
Homepage: http://synedit.sourceforge.net/
Download: SynEdit-2_0_6.zip
File Size: 965 KB
Delphi Version: Delphi 5 - Delphi 2007
Source: Included