Looks like pear shaped green Aphids to me, at least in your first pic for sure.
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The other pics probably are aphids in different stages of their life cycle.
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  Spraying (dawn dish soap)soapy water on non plant surfaces (walls/everywhere..?) should kill them all.
  Insecticidal soap on the plants a few times a month should erratic your problem... Could use neem, but inside it might be a little to much.
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Whatever you do,, do it fast as inside all natural aphid predators are no longer present and this allows them to do much more damage inside and fast. It also looks to be an intense infestation with them in big numbers on the walls/table/etc.... Won't be long till leafs start curling and little pin holes appear
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jmo