* Make software that works on older devices, the older the better.
* Make software that will keep on working for a very long time.
* Make software that uses the least amount of total energy to achieve its results.
* Make software that also uses the least amount of network data transfer, memory and storage.
* Make software that encourages the user to use it in a frugal way.

#FrugalComputing

@wim_v12e also, as much as possible, make development of said software also follow these principles as much as possible. Make it so that people with old computers can contribute.