CATWA just released a new mesh head called Jessica!
Jessica comes with a lot of amazing features: Talk animations, 9 animated expressions (not only available through the HUD but also can be trigger by local chat like gestures), Blink eyes or 4 static eye openings, 3 mouth options, 3 lash options (and several slots to save your own textures), right and left head alphas (to help fit some hairs), hide or show ears, hide or show lashes (separate up and down lashes), 5 neck sizes to fit different shapes and mesh bodies, tintable skin, hair and lashes, eye makeups, blush and lipsticks (with slots to save more textures), several skin presets and a Hairbase HUD compatible with all the Hair Textures from CATWA.
Also you can change the Head Size, the Head Stretch and Head Length of this mesh head. And it comes with a designer kit so skin designers can create appliers for this head! Go here to see the list of designers that are currently working on appliers.