I’m going buy a printer but I’m not sure which printer is compatible with linux opensuse TUMBLEWEED.
Which do you recommed me ?
Thanks in advance for any feedback
Regards,
Agustin
A little more info would be useful. Do you do a lot of printing or only occasionally? Do you need colour or is monochrome (black) ok? Scanning built in? Ethernet or wireless network connectivity? Or USB? Other features? Otherwise you may get suggestions that don’t meet your needs. 
In general, HP printers are well supported by HPLIP, Brother have Linux (CUPS) drivers for many models are well. Epson and Canon can also be considered for some models.
Useful links for researching Linux support for particular brands/models…
http://hplipopensource.com/hplip-web/supported_devices/
http://support.brother.com/g/s/id/linux/en/index.html?c=us_ot&lang=en&comple=on&redirect=on
http://download.ebz.epson.net/dsc/search/01/search/?OSC=LX
Models supported by Gutenprint (free) printer drivers included with CUPS
http://gimp-print.sourceforge.net/p_Supported_Printers.php
For scanning (if applicable), support may be provided by the vendor and/or by open source (SANE) drivers eg
http://sane-project.meier-geinitz.de/sane-supported-devices.html
If you’re not sure about a particular model, post the details here and I’m sure someone can advise further.