1. The free Sera figure gets a Japanese Demoness outfit by Niseiya:

http://www.pixiv.net/member_illust.php?mode=medium&illust_id=15264548

Linked at the post at Pixiv, including a render of the item.  

The intermediate webpage informs you that you are leaving the Pixiv website.  If you are happy with clicking on the link on the intermediate webpage, it will take you to Niseiya's public folder on SkyDrive.

( Please surf Pixiv carefully - there are plenty of mature artworks flung about the place )

 

2. Aziqo has a Dynamic Cloth T-shirt freebie for the M4 figure.  

I decline to link to his latest website because it has very explicit rendered content.  However, his partial stash of freebies may be found - for now - as a file listing at MediaFire here:

http://www.mediafire.com/?oczocan88fsvb

Please use discretion; the filenames clearly indicate what the content may be for a couple of items at least, even if there are no explicit renders.  The free Dynamic Cloth item is found here.

Eternal Hobbyist