1) Jedi - VCL
The JEDI-VCL (JVCL) library is built from code donated by the JEDI community. It consists of over 400 VCL components that can be instantly reused in your Delphi and potentially Kylix projects. The entire JEDI VCL is distributed under the terms of the Mozilla Public License (MPL), and can be freely used in both freeware/shareware, Open Source and commercial projects.
2) RxLIB
Rx-Lib is a complete set of components for Borland Delph and C Builder that allow you to build flexible and robush user interfaces and best of all they are totally free.
3) LMD Tools - Special Edition
The Freeware Edition of LMD-Tools - almost 100 components, absolutely free.
4) Globus VCL Extensions Library (GVCL)
A library of components and functions for Borland Delphi 3 - 7 and Borland C++ Builder 5 with source texts of all units. The given library is FreeWare product. You are free to distribute the library without change of source texts of units and contents of install archive.
5) Pro VCL Extensions Library (ProLib)
Freeware component library for Borland Delphi and Borland C++Builder. Includes 28 components and several useful classes, procedures and functions.
6) Max's components for Delphi
A set of some 15 Delphi components all with free source and help files.
7) About Delphi Programming Free VCL set
More than 40 components - all with full source code.