C++ Builder is a popular RAD (Rapid application development) environment produced by Borland (known for a time as Inprise) which uses a slightly modified version of the C++ language. It bears close resemblance to Delphi, as a result many consider it to be a C++ version of Delphi. C++Builder and Delphi components are inter-reusable as most components developed in C++Builder can be used in Delphi with no modification. The reverse is also true.
Other popular visual RAD tools includeMicrosoft Windows platform, now incorporates Borland CLX, a cross-platform development visual component library that supports Linux (through Kylix), and may well extend to support other platforms in the future.
The C++Builder product is distributed as various suites, appropriately named C++Builder Studio, each offering more or less functionality: