Conky and my .conkyrc file (on debian and fluxbox)

To install conky:

sudo aptitude install conky

Then create and modify ~/.conkyrc. Here is what I used:

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# set to yes if you want Conky to be forked in the background
background no

cpu_avg_samples 2
net_avg_samples 2

out_to_console no

# Use Xft?
use_xft yes

# Xft font when Xft is enabled
xftfont Bitstream Vera Sans Mono:size=8

own_window_transparent no
own_window_colour hotpink
# Text alpha when using Xft
xftalpha 0.8

on_bottom yes

# mail spool
mail_spool $MAIL

# Update interval in seconds
update_interval 1
# Create own window instead of using desktop (required in nautilus)
own_window no

# Use double buffering (reduces flicker, may not work for everyone)
double_buffer no

# Minimum size of text area
#minimum_size 280 5
#maximum_width 150

# Draw shades?
draw_shades no

# Draw outlines?
draw_outline no

# Draw borders around text
draw_borders no

# Stippled borders?
stippled_borders 10

# border margins
border_margin 4

# border width
border_width 1

# Default colors and also border colors
default_color white
default_shade_color white
default_outline_color white

# Text alignment, other possible values are commented
#alignment top_left
#minimum_size 10 10
gap_x 13
gap_y 13
alignment top_right
#alignment bottom_left
#alignment bottom_right

# Gap between borders of screen and text

# Add spaces to keep things from moving about? This only affects certain objects.
use_spacer no

# Subtract file system buffers from used memory?
no_buffers yes

# set to yes if you want all text to be in uppercase
uppercase no

TEXT
$nodename - $sysname $kernel on $machine
$stippled_hr
${color lightgrey}Uptime:$color $uptime ${color lightgrey}- Load:$color $loadavg
${color lightgrey}CPU Usage:${color #5000a0} ${cpu}% ${cpubar}
${color black}${cpugraph 000000 5000a0}
${color lightgrey}RAM Usage:$color $mem/$memmax - $memperc% $membar
${color lightgrey}Swap Usage:$color $swap/$swapmax - $swapperc% ${swapbar}
${color lightgrey}Processes:$color $processes ${color grey}Running:$color $running_processes
$color$stippled_hr
${color lightgrey}Networking:
Down:${color #8844ee} ${downspeed eth0} k/s${color lightgrey} ${offset 70}Up:${color #22ccff} ${upspeed eth0} k/s
${color black}${downspeedgraph eth0 32,150 ff0000 0000ff} $alignr${color black}${upspeedgraph eth0 32,150 0000ff ff0000}
${color lightgrey}File systems:
/ $color${fs_used /}/${fs_size /} ${fs_bar /}
${color lightgrey}Temperatures:
CPU:$color ${i2c temp 2}C${color grey} - MB:$color ${i2c temp 1}C
${font Dungeon:style=Bold:pixelsize=12}${color #88aadd}MPD: ${alignc}$mpd_artist - $mpd_title
${color #88aadd}$mpd_bar
${color #88aadd}${alignc}$mpd_status
${color}Name PID CPU% MEM%
${color #ddaa00} ${top name 1} ${top pid 1} ${top cpu 1} ${top mem 1}
${color lightgrey} ${top name 2} ${top pid 2} ${top cpu 2} ${top mem 2}
${color lightgrey} ${top name 3} ${top pid 3} ${top cpu 3} ${top mem 3}
${color}Mem usage
${color #ddaa00} ${top_mem name 1} ${top_mem pid 1} ${top_mem cpu 1} ${top_mem mem 1}
${color lightgrey} ${top_mem name 2} ${top_mem pid 2} ${top_mem cpu 2} ${top_mem mem 2}
${color lightgrey} ${top_mem name 3} ${top_mem pid 3} ${top_mem cpu 3} ${top_mem mem 3}

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Finally, add 'conky &' before 'exec /usr/bin/fluxbox' in ~/.fluxbox/startup