The following companies organise tours of the Sahara and the Roman sites of the north. They can also help obtain visas.
Akaoka (www.akaoka.com) French-run and based agency specialising in 4WD Saharan tours.
Algerie Tours (www.algerie-tours.com) This French tour company offers a wide array of set tours taking in the northern Roman sites, southern desertscapes or a combination of the two.
Bachir Hafach (http://touaregbachir.blogspot.fr) This English-speaking tour guide is based in Djanet but can also organise circuits from Tamanrasset.
Expert Algeria (www.expertalgeria.com) A very professional and reliable company that operates throughout the country and specialises in the English-speaking market. It offers tailored tours and uses only the very best specialist guides to the historical sites in the north.
Tim Missaw Tours (http://timmissawtours.e-monsite.com) This long-established company organises desert tours and has its own accommodation.
Waléne Voyages (http://walenevoyages.com) Organises 4WD and camel trekking to Asskrem and the Hoggar.