Gremple: Systematizing German Verb Conjugation

My German grammar skillz. Let me improve them.

This site, Gremple should help me do just that (at least when it comes to conjugating verbs). From the site:

"Gremple is a German verb conjugation tool. Its purpose to help non-native speakers to learn to conjugate German verbs. The idea underlying Gremple is to develop a precise description of German verb conjugation, with a minimum of data stored for each verb, and as much of the work of conjugation as reasonably possible transferred into a system of rules. This aids learning because it is easier to understand a system of rules, particularly where their underlying motivation is reasonably apparent, than to memorise a large quantity of apparently disordered (and therefore meaningless) data."

Enter a German verb and click "Konjugieren" (conjugate) or "Show How." The former gives you the same sort of verb-conjugation table that can be found at lots of other sites. The latter? Well, that's where it gets interesting.

Here's the "Show How" for the verb sein (to be). The verb and its conjugations are broken down into their component parts (stem, ending, irregular ending, etc.).

There went the rest of my morning.