Robert says that it isn't perfect but is usually pretty accurate. Use it to see what was made with Delphi. This is a full, robust relational database that is completely free and open source . See Marco Cantu's article on Delphi use for this and other tidbits. Several of these components contain several other useful enhancements as well.
Full source is included.
This is a work in progress. This is simply a data-aware progressbar, that can also be dropped on a DBCtrlGrid. Freeware with Source. This component lets you set any property of any other component on the same form in a threadsafe manner. Use this component to make it easy to use non-threadsafe VCL components in a multithreaded environment.