Common/Extended common components
QBevel
QBitmapEx
QCanvasEx
QColorDialog
QComPort
QDirListView.inc
QxEdit.inc
QFlatButton
QFormEx
QFormMDI
QImageEx
QListviewEx
QMAXSPLITTER (QSplitterEx)
MDI_API.INC
msgdlg.inc
QMenu (OwnerDraw)
QProgress
QPageSetup
QPrinterInfo
RQDialog
QSavePlus
Qspintext
QStatusBarEx
QStringGridEx - see also grids examples
QTextBtn
QTextEdit
QTreeviewEx
QTOOLBAR

RichEdit extensions

Qredex (QRichEditEx)
QTextEdit

CodeSense - CodeSense is a "branch" of the original CodeMax (see CodeMax General FAQ). It adds word completion and function highlighting support to the CodeMax control. CodeMax is a powerful Win32-based custom control that allows developers to add code editing and syntax highlighting capabilities to their applications quickly and easily.
CodeMax API Reference

See nice CodeEdit Created by Danny Jackson

Special components

QDEBUG.cmp
Qid3Tag Component
QLZFileStream
evaluate.inc
HiLight.inc
pdecl.inc
objectToolbox.inc
RQDxf.inc - CAD format
Wad3.inc
ACE32.INC-Rapid-Q & Advantage Database Local Server code

Internet components

Additional INC.

Fileops.inc
FileUtils.inc

ftiQuery.inc - retrieve information on any file extension/type

Control.inc - Windows control panel library for Rapid-Q

QSHFileOperation - copy, rename, delete and move files and folders