Oh, this one is a fun. This little book (11 pages, including cover and OGL) is packed full of great material. Basically this presents a Magical Girl class, the Star Sailors. Each level the Star Sailor gains a "Heart Power" of a different color. Very cool. They also get a "Starlight Blast" that is blasted out of her "Star Sailor Starlight Wand". I know this all sounds silly, but trust me, this is exactly the sort of thing you would see in a Magical Girl show or book. I also love how each power has a catchphrase. I would totally make my players say these to activate each attack. The powers are described, with effects. Also some background on the Starlight Entity. The sailors also can have mascots, aka pets. There is also a great monster/big bad for the sailors to fight, the appropriately named "Gloom".
While the book is overtly for White Star it includes some ideas for Modern Times and S&W.
Really, really fun. The art also really fun and appropriate. Don't like Magical Girls? You could, with minor tweaking, turn this into a Green Lantern like organization. Either way, this is great stuff.