I used to order some free samples from TI (Texas Instruments) long time ago when I was in Vietnam for my class projects. Since the import regulation in Vietnam is quite strict and the electronics market is not so potential so that only few companies provide free samples and free shipping over there. I have tried to get free samples from some big, famous companies but only TI gave me free samples that time. Now, when staying in Singapore, I have tried again to get some samples from other companies for my current project and I chose Freescale. As my project needs some sort of capacitive touch buttons so I have looked on the internet and found some quite popular and famous chips from Freescale including: MPR121 and MPR031.