NScripts is a good collection of Scripts for Nautilus.

Here's a brief description of what all it can do:

1. ChkMD5: Check MD5 Sums. This is often required to check whether a file-transfer was successful or not.
2. CopyTo: Copy Files To.. dialog (similar to that in windows xp). This will copy file only if the target has write permissions for you.
3. InstallTheme: This will install themes to various locations.
4. MkMD5: Create MD5 Sums for your files to help your colleague to verify a file transfer.
5. MoveTo: Similar to 2, except that it moves.
6. OpeninGEdit: GEdit is a powerful text editor for GNOME. This will open the selected file(s) in it.
7. Rootilus: Open the current directory in nautilus as root. (requires gksu).
8. RootOpeninGEdit: Open selected file(s) in GEdit as root. (requires gksu).
   
9. RootTerminCurdir: Open a privileged terminal (root) under current directory. (requires gksu).
10. SetAsSplash: Set the selected file as Session Splash Screen.
11. Shredder: Permanently delete files from HDD without leaving any trace.
12. TerminCurdir: Open a terminal in current directory.
13. SetAsWallpaper: If selected file is an image, set it as wallpaper with type (centered/streched).
14. SendShortcutTo: Send Links to... [Not Weblinks.. Links in unix means shortcuts in windows].
15. SendToMenu: send desktop launchers to menu ("Other"-submenu).
16. MkPatch: Compare two selected files.
17. WhichPKG: Find which package to the current file belongs to [Debian And Consorten Only]
18. WhichPKG-G: Same as 17 [Gentoo And Consorten Only]
19. WhichPKG-R: Same as 17 [RedHat and other RPM-distros]

WOW! So many functions and one set of scripts!!

Download [gnome-look.org]