As with other members, .NET Reflector does support indexers. However, if you’re unfamiliar with the notation this may not be immediately obvious, because indexers are treated as properties of the form Item[<index typename>] : <return typename>. Thus, they appear along with the other properties in the treeview, rather than in a separate group, like methods, or member variables. They are grouped together though.
.NET Reflector can also successfully reflect over and decompile generic indexers, such as in System.Collections.Generic.Dictionary<TKey, TValue>.