Can anyone suggest good GUIs for the foll:

1. File searching --- Is there any util which will search all mounted partitions and quickly give the results? ...Wildcard should be supported..Currently I am using "find / -name *iso " say to find all iso's..But i would like a GUI which also opens the file on clicking search results

2.USB Pendrive low level formatter --- Pl dont tell me "dd" does the job...On many occassions Windows has come to my rescue ...Suppose you screw up on a pendrive and it does not get recognized , then the best way is to run HP USB tool or similar... In one case , I had accidentally messed up the partition table of USB and it was not detectd by any linux utility - Gparted , Fdisk , Testdisk , fsck etc..
I also tried "dd if =/dev/zero of=/dev/sdb" , but it wrote only for the remaining empty space and gave the error disk full. I want a killer formatter.
which completely wipes the disk irrespective of any condirion (other than physical damage of course!)

3.Download manager which can speed up downloads by splitting the file as well as having the ability to shutdown the computer ...GUI (like Win apps DAP, Flashget etc)..( Pl dont suggest wget http:\\... && halt) ...

General doubt - (silly but in my mind!) In most distros u add the non free/ contrib / testing repos ...While updating do all these also update the respective packages?? In the case of conflict what will happen? Is it on FIFO basis meaning the last repo updated will prevail??

Can't help with the first three quesitons, but I do know the answer for this one. Typically, your package manager will look in all active repos, and any app for which one or more repos contains a later version than the version on your system will be updated. The default rule when multiple updates are available is typically highest version number wins. Many package managers also let you prioritize updates by repo. FIFO doesn't apply.