The first one is Dianthus barbatus, Sweet William. Try comparing your second plant to Silene latifolia. Here is a link that might be useful: Google image results

Neomarica gracilis, walking iris. -ming

Matt ALMOST hit the nail on the head...it's not that night blooming flowers don't NEED colors to attract pollinators, but that white IS the right color! White reflects the light of the moon! White flowers also bounce artificial lighting back better than brightly colored blooms. Many plants are genetically programed to attract the pollinators that are active at night; their nectar becomes sweeter, fragrances stronger, and by their light colors. Moths, of course, are the most typical of the night-time pollinators. Hummingbirds are active in the wee early hours of the morning, too. In some parts of the world, bats are important pollinators; bat pollinated flowers are typically very light colored. Cool, huh? With plants, as with most natural living organisms, form follows function.

The malvaceae one might be Pavonia lasiopetala and the one below is an autumn joy sedum, Hylotelephium.