I just figured it would be fun to share a list of applications that I enjoy with my rooted Android.

drocap2
Screenshot app.
http://market.android.com/details?id=com.gmail.nagamatu.drocap2

Fast Uninstaller For Root
Uninstalls anything!
http://market.android.com/details?id=me.notenking.root

Root Call Blocker
Disconnect any caller or phone sales person directly.
http://market.android.com/details?id=fahrbot.apps.rootcallblocker.beta

Autostarts
Turn off auto starting applications so they don’t run unless you want them to.
http://market.android.com/details?id=com.elsdoerfer.android.autostarts

ClockSync
synchronise clock from a ntp server to make sure your phone time is correct.
http://market.android.com/details?id=ru.org.amip.ClockSync

LCD Density Changer
Change resolution on your phone to get even more workspace.
http://market.android.com/details?id=com.beansoft.lcd_density_changer

Quick Boot
Simple app to reboot, reboot into recovery or bootloader.
http://market.android.com/details?id=com.siriusapplications.quickboot

ROM Manager
Backup entire rom or flash new roms or kernels.
http://market.android.com/details?id=com.koushikdutta.rommanager

Root Explorer
Root access file manager.
http://market.android.com/details?id=com.speedsoftware.rootexplorer

SD Speed Increase
Speed up SD card read access.
http://market.android.com/details?id=com.sdincrease.it

SetCPU
Scale cpu on demand to preserve battery.
http://market.android.com/details?id=com.mhuang.overclocking

Tegrak Overclock Ultimate
Overclock cpu (requires overclockable kernel)
http://market.android.com/details?id=com.tegrak.overclock.ultimate

Titanium Backup PRO
Backup all user and system applications and settings, and restore after rom upgrade. Supports even dropbox storage.
http://market.android.com/details?id=com.keramidas.TitaniumBackupPro

Hope this guide shows how useful a root of your Android phone might be, and encourages you to do it also.