how to type these: ヶ,々? directly on keyboard.
Usually I just type the word that it is in.
ひとびと -> 人々
さまざま -> 様々
さんかげつ -> 三ヶ月
々 repeats the previous kanji, often with rendaku. By itself it can be spelled "noma" because it looks like the katakana ノマ smashed together.
ヶ may look like the katakana ケ, but it is not. I usually see it in the pattern (number)ヶ月, where it is pronounced か, confusingly enough. The most efficient way I know to type it by itself is to first do かげつ -> ヶ月 then hit backspace. Edit: Ciaran's suggestion of typing lowercase L then "ke" works on Google IME, nice.