I always appreciate coding in standard C++. There's something elegant about working with a language that's both powerful and standardized, where you can write portable code that runs anywhere.
Desktop Calculator is an application I've developed in standard C++, based on the calculator example (6.1) from "The C++ Programming Language", Third Edition by Bjarne Stroustrup. If you've read the book, you know it's one of the most comprehensive examples in the text, demonstrating how to build a complete, interactive program with proper error handling and architecture.