Another good anime series lately: Sky Girls, by J.C. Staff. In 2071, a sort of mechanical-biological hybrid species appears called the WORMs, generally wreaking havoc on the human race on a large scale. In response to the threat, the world unites into a global force to deal with the WORMs. As a result of unification and the threat of extinction, the use of WMDs was sanctioned and the use of said weapons wiped out most of military age people across the globe. Antartica disappeared and the coastlines were drastically changed due to that.
Cue the girls, now the only ones left to do the fighting. Their weapons are knows as "Sonic Diver" units, which are basically mecha-lite (or powered armor that can fly). The main character is your typical naive type from one of the remaining islands and of course is a late comer to the team at the beginning of the story. She has a twin brother who went missing during an incident in their childhood, which becomes a plot element later on.
The art style is your typical moe, with some cool mecha and battleship designs as a strong plus. The animation quality is... above average, also.
