The Internet Archive discovers and captures web pages through many different web crawls.
At any given time several distinct crawls are running, some for months, and some every day or longer.
View the web archive through the Wayback Machine.
Qt's C++ APIs provide features for easy cross-platform development. Design UIs with Qt QML - a declarative language with the ability to describe business logic with JavaScript. If you prefer Python or other languages we have a wide range of language bindings.