Free

Free sample of thread
http://www.flowerthread.com/freesample.html
Send a SASE and get a FREE skein, conversion chart, shop list and FREE sheet of charted designs!

Free HP Paper
http://www.hpworksdata.com/hp-pavilion-versus-panasonic.html
Sign up for a free paper pack sample. You choose from a few options.

Simplistick
http://www.simplistickhome.com/request/freesample
Removable wall decorations. Fill out form for one free sample.

Glue Dots
http://www.buygluedots.com/free_glue_dot_samples.html
Follow the request on the link above. An SASE is recommended but not necessary.

Idea Paint
http://www.ideapaint.com/site/shop_home.html#sample
Turns any surface into a dry erase board. Get a free 3x5 sample.