diff --git a/compute_total_pkg_size.py b/compute_total_pkg_size.py
new file mode 100755
index 0000000..b89b8b6
--- /dev/null
+++ b/compute_total_pkg_size.py
@@ -0,0 +1,105 @@
+#!/usr/bin/env python 
+'''
+http://ubuntuforums.org/showthread.php?t=1154940&highlight=get_dependencies
+'''
+
+import sys 
+from subprocess import Popen,PIPE,STDOUT 
+
+
+__usage__=''' 
+compute_total_pkg_size.py emacs 
+''' 
+
+pkg=sys.argv[1] 
+
+
+def report_lines(alist,max_len,vdiv,hline): 
+    ''' 
+    alist is a list of tuples 
+    report_lines returns a list of strings 
+    ''' 
+    result=[] 
+    svs=' '+vdiv+' ' 
+    for row in alist: 
+        if row[0]=='-': 
+            line_string=hline 
+        else: 
+            data_justified=[str(elt).rjust(num) for elt,num in zip(row,max_len)] 
+            data_svs=svs.join(data_justified) 
+            line_list=[vdiv,data_svs,vdiv] 
+            line_string=' '.join(line_list) 
+        result.append(line_string) 
+    return result 
+
+def report_table(alist,corner='+',hdiv='-',vdiv='|',header=True): 
+    max_len=max_col_len(alist) 
+    hline_l=[corner, 
+             corner.join([hdiv.ljust(max_num+2,hdiv)  
+                          for max_num in max_len]), 
+             corner] 
+    hline=''.join(hline_l) 
+    result=report_lines(alist,max_len,vdiv,hline) 
+    if header: 
+        new_result=[hline,result[0],hline,] 
+        new_result.extend(result[1:]) 
+    else: 
+        new_result=[hline,] 
+        new_result.extend(result) 
+    new_result.append(hline) 
+    result='\n'.join(new_result)+'\n' 
+    return result 
+
+def max_col_len(alist): 
+    return [max([len(str(elt)) for elt in column]) for column in zip(*alist)] 
+
+def find_installed(): 
+    ''' 
+    Returns a list of all the packages installed on the computer 
+    ''' 
+    proc=Popen("dpkg --get-selections | awk '/install/{print $1}'",  
+               shell=True, stdout=PIPE, stderr=open('/dev/null'),) 
+    return proc.communicate()[0].split() 
+
+def get_size(pkg): 
+    ''' 
+    Returns (download size, installed size) in KiB 
+    ''' 
+    cmd='apt-cache show %s'%pkg 
+    proc=Popen(cmd, shell=True, stdout=PIPE, ) 
+    size=0 
+    install_size=0 
+    for line in proc.communicate()[0].split('\n'): 
+        if line.startswith('Size: '): 
+            size=line.split()[-1] 
+        elif line.startswith('Installed-Size: '): 
+            install_size=line.split()[-1] 
+    return (int(size)/1024,int(install_size)) 
+
+def get_dependencies(pkg): 
+    ''' 
+    Returns all the (recursive) dependencies of a package 
+    ''' 
+    cmd='apt-rdepends -s=DEPENDS %s'%pkg 
+    proc=Popen(cmd, shell=True, stdout=PIPE, ) 
+    return proc.communicate()[0].strip().split('\n') 
+     
+deps=get_dependencies(pkg) 
+installed_packages=find_installed() 
+needed_packages=list(set(deps)-set(installed_packages)) 
+(sizes_dep,sizes_dep_installed)=zip(*[get_size(pkg) for pkg in deps]) 
+(sizes_needed,sizes_needed_installed)=zip(*[get_size(pkg) for pkg in needed_packages]) 
+data=[('Package (*=needed)','Download size (KiB)','Installed size (KiB)')] 
+for apkg,size,install_size in zip(deps,sizes_dep,sizes_dep_installed): 
+    if apkg in needed_packages: 
+        data.append(('%s *'%apkg,size,install_size)) 
+    else: 
+        data.append((apkg,size,install_size)) 
+print(report_table(data)) 
+
+data=[('','Sizes (KiB)')] 
+data.append(('Total download size',sum(sizes_dep))) 
+data.append(('Total installed size',sum(sizes_dep_installed))) 
+data.append(('Total download size needed',sum(sizes_needed))) 
+data.append(('Total installed size needed',sum(sizes_needed_installed))) 
+print(report_table(data))  
diff --git a/wm_minimize.sh b/wm_minimize.sh
new file mode 100755
index 0000000..7565110
--- /dev/null
+++ b/wm_minimize.sh
@@ -0,0 +1,40 @@
+#! /bin/sh
+
+# minimize/restore windows on current desktop
+# -----------------------------------
+# vermaden [AT] interia [DOT] pl
+# http://toya.net.pl/~vermaden/links.htm
+
+CURRENT_DESKTOP=$( wmctrl -d | egrep "^[0-9][ ]{2}\*" | awk '{print $1}' )
+WINDOW_LIST=$( wmctrl -l | egrep "^[0-9]x.{8}\ {2}${CURRENT_DESKTOP}" | awk '{print $1}' )
+
+WINDOW_COUNT=0
+for WINDOW in ${WINDOW_LIST} ;do
+   WINDOW_COUNT=$(( ${WINDOW_COUNT} + 1 ))
+done
+
+minimize () {
+  for WINDOW in ${WINDOW_LIST}; do
+    wmctrl -t ${CURRENT_DESKTOP} -i -r ${WINDOW} -b add,hidden
+  done
+  }
+
+restore () {
+  for WINDOW in ${WINDOW_LIST}; do
+    wmctrl -t ${CURRENT_DESKTOP} -i -r ${WINDOW} -b remove,hidden
+  done
+  }
+
+MINIMIZED=0
+for WINDOW in ${WINDOW_LIST}; do
+  if xprop -id ${WINDOW} _NET_WM_STATE | grep -q NET_WM_STATE_HIDDEN; then
+    MINIMIZED=$(( ${MINIMIZED} + 1 ))
+  fi
+done
+
+if [ ${MINIMIZED} -eq ${WINDOW_COUNT} ]; then
+  restore
+else
+  minimize
+fi
+