Transitions

Addition - again, also, and, and then, besides, equally important, finally, first, further, furthermore, in addition, in the first place, last, moreoever, next, second, still, too
Comparison - also, in the same way, likewise, similarly
Concession - granted, naturally, of course
Contrast - although, and yet, at the same time, but at the same time, despite that, even so, event though, for all that, however, in contrast, in spite of, instead, nevertheless, notwitstanding, on the contrary, on the other hand, otherwise, regardless, still, though, yet
Emphasis - certainly, indeed, in fact, of course
Example or Illustration - after all, as an illustration, even, for example, for instance, in conclusion, indeed, in fact, in other words, in short, it is true, of course, namely, specifically, that is, illustrate, thus, truly
Summary - all in all, altogether, as has been said, finally, in brieft, in conclusion, in other words, in particular, in short, in simpler terms, in summary, on the whole, that is therefore, to put it differently, to summarise
Time Sequence - after a while, afterward, again, also, and then, as long as, at last, at lenght, at that time, before, besides, earlier, eventually, finally, formerly, further, furthermore, in addition, in the first place, in the past, last lately, meanwhile, moreover, next, now, presently, second, shortly, simultaneously, since, so, far, soon, still, subsequently, then, therefore, too, until, until now, when