They have slightly different connotations which you may want to pay attention to: coded is more frequently used to describe the action of coding (in past tense), while encoded is often first interpreted as an adjective describing something that has been, well, encoded. If you're a programmer, it's not very idiomatic to say "I encoded some sweet software" if you mean you wrote the code to it; and saying "That video file is coded" (instead of encoded) is misleading. So, if your dilemma is between www.peoplecodedlinux.com and www.peopleencodedlinux.com, the former is a better choice.