Feats, skills and traits are all similar in that they help define what your player character can and cannot do. Traits must be chosen while creating a character, feats can be chosen every three character levels, and skills can be chosen and improved every level. While skills are arguably the most useful of these three, feats are the most dramatic and traits (which are entirely optional) help define the characters initially.

Feats
Being abilities that put the "hero" in heroing. Two feats and a rather lengthy explanation of them. Heh.

Skills
Being abilities that are useful every day. Aside from something of an apology, there's nothing here yet.

Marks
Being abilities tied to both a strength and a weakness, used to define a character upon creation. Alas! there is material here, as well as a name change for it.