I recently found glabels, and find it to be great. I've only used it so far for printing business cards, but I didn't know about this app until recently, so thought that others might not know about it either. Following the format for these reviews:
My system: 1.2Ghz Celeron, 40GB HD, 256MB memory.
App description: To be able to use ready-made labels and business cards.
Installation: yum install glabels (with attached yum.conf).
Ease of use: 4
Home page: http://glabels.sourceforge.net/