[HTC Sensation] Gunkk:
There are a few superwipes out there. Most of them will clear ROM & Kernel:

Cache

System

Data

Leaving you with just a radio (which is unbootable except into recovery). This one will also clear any rom-related files from the SD card.

Best thing is to do, if you are unsure, is dig down into the zip file and read the code to see what it does!

Example:

#
# Updater-script for Android Revolution HD by mike1986
# Thanks to amazinglarry311 for the idea

ui_print("");
ui_print("");
ui_print("");
ui_print("==============================================");
ui_print("| Wiping Script |");
ui_print("| This operation will remove all your data |");
ui_print("| You have 10 seconds to remove the battery |");
ui_print("| to cancel this procedure |");
ui_print("==============================================");
ui_print("");
ui_print("");
ui_print("");
run_program("/sbin/sleep", "10");
ui_print("1. Erasing & formatting EXT4 *CACHE* partition");
assert(unmount("/cache") || ui_print("(cache is unmounted already)"));
run_program("/sbin/erase_image", "cache");
format("ext4", "EMMC", "/dev/block/mmcblk0p24");
ui_print("");
ui_print("");
run_program("/sbin/sleep", "5");
ui_print("2. Erasing & formatting EXT4 *SYSTEM* partition");
assert(unmount("/system") || ui_print("(system is unmounted already)"));
run_program("/sbin/erase_image", "system");
format("ext4", "EMMC", "/dev/block/mmcblk0p22");
ui_print("");
ui_print("");
run_program("/sbin/sleep", "5");
ui_print("3. Erasing & formatting EXT4 *DATA* partition");
assert(unmount("/data") || ui_print("(data is unmounted already)"));
run_program("/sbin/erase_image", "userdata");
format("ext4", "EMMC", "/dev/block/mmcblk0p23");
ui_print("");
ui_print("");
run_program("/sbin/sleep", "5");
ui_print("4. Removing system files from SD Card");
delete_recursive("/sdcard/.android_secure");
delete_recursive("/sdcard/.bookmark_thumb1");
delete_recursive("/sdcard/.data/footprints");
delete_recursive("/sdcard/.data/mail");
delete_recursive("/sdcard/Android/data/com.android.providers.media");
delete_recursive("/sdcard/Android/data/com.google.android.apps.genie.geniewidget.news-content-cache");
delete_recursive("/sdcard/Android/data/com.google.android.apps.maps");
delete_recursive("/sdcard/.data/navigator/Data/Temporary");
delete_recursive("/sdcard/LazyList");
delete_recursive("/sdcard/LOST.DIR");
ui_print("");
ui_print("");
ui_print("");
ui_print(">>> All partition wiped successfully! <<<");
ui_print("");
ui_print("");
ui_print("");
run_program("/sbin/sleep", "5");
ui_print("5. Now checking filesystems for errors");
run_program("/sbin/e2fsck", "-p", "/dev/block/mmcblk0p22");
run_program("/sbin/e2fsck", "-p", "/dev/block/mmcblk0p23");
run_program("/sbin/e2fsck", "-p", "/dev/block/mmcblk0p24");
ui_print("");
ui_print("");
run_program("/sbin/sleep", "5");
ui_print("6. Creating log file on SD card");
run_program("/sbin/busybox", "cp", "/tmp/recovery.log", "/sdcard/superwipe.log");
ui_print("");
ui_print("");
run_program("/sbin/sleep", "5");
ui_print("==============================================");
ui_print("| Now you can flash Android Revolution HD |");
ui_print("| Device will reboot in recovery mode |");
ui_print("==============================================");
run_program("/sbin/sleep", "5");
run_program("/sbin/reboot", "recovery");