Useful scripts that I've written for public use:
All Protection v4.7 (mirror) - Latest beta: All Protection v4.9b4
An all around protection script which protects your channels from all types of floods (public/private/notice/CAPS/codes/clones/joins/parts/revolving door/mass floods/takeovers/drones/advertisements/bad words/nicks and more...) and has a built-in anti-spam bot which can cycle your channels and signal your Eggdrop to kick offenders. Includes custom features like kick info and counter in kick-messages and banning through services. Also can akill/k-line offenders if the bot is an IRCOp; script can be tweaked based on your desire.
Fz Commands v3.1 (mirror)
A script which allows public and private control of your bot. It has admin and owner access levels, highly secure and can assign different access levels for users on every channel. Contains all essential commands such as op, voice, kick, ban, add, remove, chattr...etc (includes manipulating eggdrop's internal ban list). Recommended for controlling your channel.
Black List v1.4 (mirror)
A script which allows you to add hostmasks to a black list via DCC or public commands. Very fast in banning blacklisted users and protects the bot from flooding out if many blakclisted users join simultaneously. Nifty options included in the script.
Ping v1.4 (mirror)
A nice little script that replies to !ping requests (can be enabled/disabled on each channel).
Scripts also available at www.egghelp.org
All scripts are published under the General Public License (GPL).