Aidsmap has produced a useful summary sheet of the major ARVs used in the UK:

http://www.aidsmap.com/resources/Antiretroviral-drugs-chart/page/1412453/

There are also one-page, more detailed, fact sheets for every drug:

http://www.aidsmap.com/resources/Antiretroviral-drug-factsheets/page/3121474/

These are useful summaries in everyday language, and easier to read than the huge factsheets supplied by the drug companies.