Free Borland C++ Builder components from Lyncon:
 
TWaveIO.zip Wrappers for the waveIn* and waveOut* WinAPI functions. class
TShellPipe.zip Making it possible to open a communication channel between a DOS program (like DOS itself) and a Windows program. VCL
MComPort_BCB4.zip A COM port component with many properties and events. VCL
MComPort_RAD2007.zip A COM port component with many properties and events. VCL
MNet_including_demo.zip MLinkLabel - Making clickable weblike links in your applications. VCL
TPots.zip TTurnPot - A mixertable-like turnpot. VCL
TLabels.zip TShadowLabel - A label with shadows and highlights. The text can also be angled. VCL