Before WWI Germany made the triple-alliance with Italy and Austria-Hungary.
Bulgaria and the Ottoman empire joined the alliance, against the Entente with UK, France and Russia. Other countries joined the Entente too.
When Italy swapped sides in 1915, the remainder of the war alliance was called the central powers.
In WWII the term "the allies" was used about those fighting with the UK against the Axis powers. The Axis was Germany, Italy and Japan, with their collaborators like Hungary, Romania, Soviet (until 1941), Bulgaria etc. Italy left the Axis when Mussolini's rule was overthrown. Non-occupied France got a nazi-friendly regime in Vichy and occupied states often had a collaborating government in Europe and Asia. Due to the war against Soviet Union and their switch to the allied side, made that Finland for some time fought on the Axis side, then against the Axis again driving out German troops from Finland.
Spain, Sweden and South American countries in particular, were officially neutral in WWII but acted in different ways that helped Germany, as large parts of the population had a friendly attitude, as it in fact was in most countries in the beginning.
Since this question is categorized under WW2 I assume the questioner means who were Germany's allies during the war. Germany's allies today are essentially all EU, NATO and UN countries.
Germany's main allies during the war were Italy and Japan. Hungary, Romania, Bulgaria, Yugoslavia, Finland and Thailand were also allies of Germany's, to varying degrees.
Britain had no allies.
French and Indians were allies. Colonists and British were allies.
Were Poland and Germany allies with the United States during the Revolutionary War?
the patriots or the Americans took fort ticonderoga's cannons and won the revolutionary war so the patriots are our allies
Britain, USA and Canada were the main allies.
Germany was in an alliance with Austria-Hungary and Italy.
Russia had to depend on themselves to stop germanys expansion since there ports were unavailable
Britain had no allies.
Germany, Austria-Hungary, the Ottoman Empire and Bulgaria.
Tension was the cold war. The allies were always preparing (on patrol and on manuevers) during the cold war.
Norway's allies were Britain, and the allies including the U.S.
French and Indians were allies. Colonists and British were allies.
French and Indians were allies. Colonists and British were allies.
The English and Algonquians were allies during the French and Indian war.
Social War (in Latin Socii = allies)
The Netherlands were Allies in World War II.
America helped it's allies during World War 2 by shooting people and stuff. they were smart.