Right-click on a file or folder in a Finder window and select Automator -> openterminal to open it in Terminal.app.
(i.e. cd to the folder or open the file in the nano text editor)

open -a Automator

#--------------------------------------------------

Drag or add actions here to build your workflow:
Library: Finder -> Action: Get Selected Finder Items
Library: Automator -> Action: Run Shell Script
                                 - Shell: /bin/sh
                                 - Pass input: as arguments


if [[ $# -gt 1 ]]; then exit 0; fi

if [[ -d "$@" ]]; then

   printf "%s" "$@" | /usr/bin/pbcopy
   #/usr/local/bin/cpath # cf. http://osxutils.sourceforge.net

   /usr/bin/open -a Terminal

   /usr/bin/osascript -e 'tell application "Terminal" to do script with command "printf \"\\e[8;26;115;t\"; printf \"\\e[3;300;240;t\"; cd \"$(/usr/bin/pbpaste)\"; /usr/bin/clear" in (first window whose name contains " ")'

# alternative without /usr/bin/clear (experimental)
# requires:
# defaults write com.apple.Terminal Autowrap NO
# or:
# Terminal menu -> Window Settings ...  -> Buffer -> in the Scrollback 
# section check the box next to "Wrap lines that are too long" 
# -> click "Use Settings as Defaults"

#   /usr/bin/osascript -e 'tell application "Terminal" to do script with command "cd \"$(/usr/bin/pbpaste)\"; /usr/bin/tput cup 0 0; /usr/bin/tput dl1; /usr/bin/tput el; /usr/bin/tput dl1; /usr/bin/tput el" in (first window whose name contains " ")'

   exit 0

elif [[ -r "$@" ]]; then 

   printf "%s" "$@" | /usr/bin/pbcopy

   /usr/bin/open -a Terminal

   /usr/bin/osascript -e 'tell application "Terminal" to do script with command "printf \"\\e[8;26;115;t\"; printf \"\\e[3;300;240;t\"; /usr/bin/clear; /bin/sleep 0.3; /usr/bin/nano \"$(/usr/bin/pbpaste)\";" in (first window whose name contains " ")'

exit 0

fi

exit 0


# now save the openterminal Automator workflow as a contextual menu item:
# Automator -> File -> Save As Plug-in ... -> Save Plug-in As: openterminal -> Plug-in for: Finder -> click Save


#--------------------------------------------------


open -a Automator ~/Library/Workflows/Applications/Finder/openterminal.workflow

/usr/bin/automator ~/Library/Workflows/Applications/Finder/openterminal.workflow >/dev/null 2>&1

More on how to cd effectively:

- cdto - Finder Toolbar button to open a Terminal window
- History of visited directories in BASH
- bash Tips and Tricks: $CDPATH
- Bash Shell Customisation: cdable_vars
- The Definitive Guide to Bash Command Line History
- Working Productively in Bash's Vi Command Line Editing Mode (with Cheat Sheet)
- Leopard's bash auto-completion vs. symlinked directories
- zg.rb (ZoomGo)
- fuzzy_file_finder.rb
- cd to Directory within Terminal
- Pimp my shell
- Per-directory bash history
- Terminal Tricks: A Fuzzy cd Command
- Cdots - Change directory back - 1-7 times - and forth with TAB-completion
- Fine-tuning tab completion in Bash
- recd on sourceforge
- recd - cd again via regular expression
Download with: curl -L -O http://heanet.dl.sourceforge.net/sourceforge/recd/recd.sh

Right-click on a folder in a Finder window and select Automator -> newfolder to create a "NewFolder".

open -a Automator

#--------------------------------------------------

Drag or add actions here to build your workflow:
Library: Finder -> Action: Get Selected Finder Items
Library: Automator -> Action: Run Shell Script
                                 - Shell: /bin/sh
                                 - Pass input: as arguments

current_dir="$@"
name_of_new_dir="NewFolder"

if [[ -d "${current_dir}" ]] && [[ -w "${current_dir}" ]]; then
   /bin/mkdir -p "${current_dir}${name_of_new_dir}"
fi

exit 0


# now save the newfolder Automator workflow as a contextual menu item
Automator -> File -> Save As Plug-in ... -> Save Plug-in As: newfolder -> Plug-in for: Finder -> Save

#--------------------------------------------------

open ~/Library/Workflows/Applications/Finder/newfolder.workflow

# now open your Home directory, right-click on a folder and select Automator -> newfolder to create a "NewFolder" 
open ~

Right-click on a file or folder and select Automator -> virusscan to scan the selected Finder item for viruses.
Requires Automator (Mac OS X 10.4 or later), ClamAV (man clamdscan) and CocoaDialog (for the notification pop-up).
See also: Compile ClamAV from source on Mac OS X and Update to ClamAV 0.94

# get the ClamAV icon
cd ~/Desktop
curl -L -O http://freshmeat.net/redir/clamav/29355/url_tgz/clamav-0.92.tar.gz
tar -xzf clamav-0.92.tar.gz
cd clamav-0.92
sudo cp ~/Desktop/clamav-0.92/docs/html/img2.png /usr/local/bin/CocoaDialog.app/Contents/Resources/clamav.png
#sudo sips -i /usr/local/bin/CocoaDialog.app/Contents/Resources/clamav.png
sudo chown -R root:wheel /usr/local/bin/CocoaDialog.app
sudo chmod -R 0755 /usr/local/bin/CocoaDialog.app


open -a Automator


#----------------------------------------------------


Drag or add actions here to build your workflow:
Library: Finder -> Action: Get Selected Finder Items
Library: Automator -> Action: Run Shell Script
                                 - Shell: /bin/bash
                                 - Pass input: as arguments

cocoadialog="/usr/local/bin/CocoaDialog.app/Contents/MacOS/CocoaDialog"
CD_Resources="/usr/local/bin/CocoaDialog.app/Contents/Resources"

for f in "$@"; do

   # remove a trailing slash character "/" if necessary
   /usr/local/bin/clamdscan -v "${f%/}"
   #/opt/local/bin/clamdscan -v "${f%/}"

   #/opt/local/bin/clamdscan --quiet "$f" 2>/dev/null


   return_code=$?

   if [[ $return_code -eq 0 ]]; then
 
      /usr/bin/say OK

      $cocoadialog bubble --no-timeout --x-placement center --y-placement center --background-top "00FF00" \
          --background-bottom "00FF99" --icon-file $CD_Resources/clamav.png --title "Scanned item is OK!" \
          --text "$f"

   elif [[ $return_code -eq 1 ]]; then

      /usr/bin/say "virus alert"

      $cocoadialog bubble --no-timeout --x-placement center --y-placement center --background-top "FF0000" \
          --background-bottom "FF0066" --icon-file $CD_Resources/clamav.png --title "WARNING: VIRUS ALERT!!!" \
          --text "$f"

   else

      $cocoadialog bubble --no-timeout --x-placement center --y-placement center --background-top "FFCC00" \
          --background-bottom "FFCC33" --icon-file $CD_Resources/clamav.png --title "ClamAV virus scan failed!" \
          --text "Please, check your ClamAV setup! Return code of man clamdscan: $return_code"

      exit 1

   fi

done

exit 0


#----------------------------------------------------


# save the virusscan Automator workflow as a contextual menu item
Automator -> File -> Save As Plug-in ... -> Save Plug-in As: virusscan -> Plug-in for: Finder -> Save

open ~/Library/Workflows/Applications/Finder/virusscan.workflow

# test some files in ...
open ~/Desktop/clamav-0.92/test