seecretGeek has a nice blog entry about the three laws of Software Development, inspired by Isaac Asimov’s Laws of Robotics (minor adaptations from me):

A developer must write code that creates value.
A developer must make their code easy to maintain, except where such expenditure will conflict with the first law.
A developer must reduce their code to [...]

As part of another project I am developing ensure4j. The syntax (see the examples here) is working quite nicely, ensure4j is already very useful for internal use.
Lately I was busy adding tests that are able to verify if some code (e.g. an optimizer that uses random, like genetic algorithm, simulated annealing, …) produces the desired [...]