Database of information from cemeteries in the UK. The collection is strongest for Scotland and London but it is worth checking the database coverage regularly. You can do a free search and view the name, date of burial and cemetery. You will need to pay to view more detailed information. Cremation registers are also included.
https://www.deceasedonline.com/servlet/GSDOSearch
This site has lists of burials for a range of graveyards in central Scotland. Photographs and full transcriptions can then be ordered for a small fee.
http://www.memento-mori.co.uk
Includes inscriptions from: Badenoch & Strathspey, Caithness, Inverness-Shire, Moray & Nairn, Overseas (Servicemen Gibraltar and some inscriptions from Boston, Mass.)Ross & Cromarty, Scotland Other, Sutherland, Tomnahurich, Western Isles. Plus Landmarks (churches, memorials, plaques, etc. of genealogical and historical interest).
https://sites.google.com/site/highlandmemorialinscriptions/home
This site has lots of photographs of military graves from around Scotland arranged by region. Some photographs of soldiers are also included.
http://scottishwargraves.phpbbweb.com/scottishwargraves.html