Re: KDE on old laptop
Concur on Eric's KDE stuff, and pretty much everything else that he has packaged for Slackware. (Alien BOB's real name is Eric Hameleers. He answers to both.)
http://www.slackware.com/~alien/
Running Slack-stable on a 16 year old HP laptop (zv5105, Radeon 9000 IGP) with 2gigs. It works just fine, rarely hits swap when doing normal office stuff. Note that it's still on Slack 14.2's version of KDE4, I don't plan on trying Plasma5 on it.