used to be a good free one called callwave that also worked as an answering machine when you are online (dialup). here in the states we usually use little caller ID boxes or have them built into cordless phones. nisam to video kad sam bio u hrvatskoj proslog ljeta ali ne znam.

here's a web site i found quickly but don't know how good the software is...at least it is free for 45 days

http://www.yes-tele.com/

otherwise go to download.com and search for "caller ID" and adsl

nadam se da sam ti pomagao...