This addon is a lightweight reforging calculator that helps you figure out the optimal strategy to reforge your gear given your stat weights and caps. It is mostly intended for damage dealers, since other roles don't have caps as important as hit/expertise.
The addon is designed to have minimal interface and configuration. To run it, type /reforge and a ReforgeLite main window will show up (by default, it will also show up when you open reforging UI). You will see your current item stats in a table on the left, and configuration area on the right. Enter your stat weights in the first table. In the second table, select up to two stats that will have lower (or zero) weight after a certain point. You can choose whether these stats will be reforged to above, below, or anywhere near the cap value.
When you're done setting up weights/caps, press Calculate. IMPORTANT: If you set up two capped stats, the algorithm will likely run out of memory trying to calculate the optimal strategy. For this reason (maybe until I figure out a better algorithm) there is a Speed slider. A value of 1 will always find the optimal solution, but doesn't work with two capped values. A value of 5 or higher usually works, but it reduces the algorithm precision. You can click the Calculate button multiple times to try to achieve a better result; the best result will be saved in the Best result section.
Calculator supports spirit to hit conversion, but it assumes that you have put 2 points in the corresponding talent, achieving a 100% conversion rate.
Once the calculation finishes, you will see a section with your stats after reforging, and the difference from your current stats. Click on the Show button to see which items should be reforged. Items that you have already reforged in the suggested way will have checks next to them.
However, on a german client, the space for the colun labels is to small so the labels overlap so that they are not recognizable any more. The issue here is that the german terms are longer than the english ones (eg. Hit = Trefferwertung).
Thats localization problem. You can fix it by going to addon localization page and changing what you think needs to be changed, then when I update the project it will get fixed automatically. The phrases you are looking for are named "Hit", "Haste", "Exp" etc.
I don't know any languages besides Russian/English so I can't check if translations are correct, and I guess I overlooked the long strings when I confirmed them. http://www.wowace.com/addons/reforgelite/localization/