PHP Name of Script -0-T-

Hi, I want to have an index of services available on my site.. eg: webdesigners programmers (if possible sub category here - JSP,ASP,PHP,C etc) graphic artists webhosting etc etc where a person comes, clicks on the category and either searches the available entries or can enter his/her own entry....what do you call these scripts? I tried "PHP index services scripts" on google without success.. or if someone has any experience with using a script like this kindly give me the URL if possible. I'm pretty sure this must be popular and dont want to go writing this from scratch if there is a ready made one out there which may just need its guts rearranged or is already good to go. Thanks for any suggestions,links,comments etc. Cheers, -Ryan We will slaughter you all! - The Iraqi (Dis)information ministers site http://MrSahaf.com