Irssi is probably one of the best text-based IRC clients around, take a look at http://irssi.org/ for general info.
| autochannel.pl | sign | Add channels on join and remove on part |
| chansort.pl | sign | Sort channels and queries |
| dccmove.pl | sign | Move completed dcc gets to the subfolder done |
| friends_peder.pl | sign | Basicly an autoop script with a nice interface ;) |
| keepnick.pl | sign | Try to get your nick back when it becomes available. |
| query.pl | sign | Give you more control over when to jump to query windows and when to just tell you one has been created. |
| uptime.pl | sign | Try a little harder to figure out uptime |
| upgradeinfo.pl | sign | Show how old your currently running irssi is compared to the current binary. |
| log2ansi | sign | convert mirc color and irssi internal formatting to ansi colors, useful for log filtering |
Check out http://irssi.org/scripts/ for other scripts for irssi. If you wonder what header-minor-mode is, you can get the elisp code here.