Lexmark Printer Maintenance Tools
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Programs for maintanance of Lexmark inkjet printers: Moving out the print
head to change the cartridges, adjusting the print heads, cleaning the
nozzles ...

pup           - Graphical program for the Lexmark Optra 40 and 45 printers,
                probably also works for the Lexmark 5xxx and 7xxx, also
                for setting default options on nearly every laser printer

showcartridges
hidecartridges
headalign
headclean     - Command line programs for the Lexmark 5xxx and 7xxx

changecartridge - Another command line tool for changing the
                ink cartridges in the Lexmark 5xxx and 7xxx 

lm1100change,
lm1100back    - Command line tools for changing the cartridge in Lexmark
                1xxx printers

Since Lexmark will not release protocol specifications the authors had
to dissassemble the byte codes sent by their Windows printer maintenance
programs to create this.