There are repositories of tape software available online, for example CPC Power for Amstrad CPC machines.
What is the fastest and simplest way to load such games onto an unmodified computer, with the minimum of extra equipment? I am using an Amstrad CPC6128, but it would be helpful to also include other machines that used tape decks, such as ZX Spectrum, Commodore 64 or BBC Micro.
Note: I intend this question as a single place to store the most efficient and effective ways for each machine to download and run software without additional hardware (other than simple cables etc). Obviously, some internet connected device is required such as a computer or phone!