Borland Turbo Explorer editions
Borland has recently released a number of free (as in beer) Turbo Explorer edition developer tools (Turbo Delphi, Turbo Delphi for .NET, Turbo C++, and Turbo C#). They also offer Pro versions which you have to pay for.
Note that according to their site, you can only install one of the Explorer editions on a machine, and you also cannot install the Turbo editions if you already have Borland Developer Studio installed.
You will also need to register for an installation key from Borland’s download site.