Common algebraic categories are group, ring, module and algebra. Some of them have the corresponding object in topology, like topological group and topological linear space. We define them by making operations continuous or smooth. So there are two questions left:
(1) Is it reasonable to generalize topological linear space to topological module? And instead of $\mathbb R$ or $\mathbb C$ as coefficient in functional analysis, can we use a ring $R$?
(2) How about topological ring and topological algebra? Are there any reference about them?
As for Topological Ring and Topological algebra are concerned they are important topics to study, for examples see this http://en.wikipedia.org/wiki/Topological_ring and http://en.wikipedia.org/wiki/Topological_algebra... infact there is a very nice book written on Rings of Continuous Functions by Gillman and Jerrison. The fact that study of topological groups find more applications is because they can be used to study symmetries and they first arose while studying groups of continuous transformations, both of which find immense utility in physics also.