それはそうと => anyway N2
そうです => That's right N5
Confirm
それはそうと => By the way N2
Miscellaneous
そうにない/そうもない => very unlikely to; showing no signs of ~ N2
そうだ => Seem, like… N4
Situations and Experiences
そうにない => N2
Potential, Possibility
そうして => and, like that N3
Happens next
どうも ... そうだ/ ようだ/ らしい => It seems, probably N3
Speculation
そのうち => some day/some time eventually N3
Short period of time
いかにも…そうだ => Looks truly... N3
Accept, agree
そうかといって => but still N3
Beyond expectations
そうだ => It looks like / appears like; seeming ~ N4