The photo is a bit distant, but the top left and middle plants are moth orchids. Phalaenopsis is one of the easiest orchids to grow indoors. To get it to rebloom, make sure it gets enough light (bright east or west window), but not direct sunlight and feed with a slow release or organic fertilizer formulated for orchids. It does not tolerate temperatures below 60-65 degrees F. When in bud or bloom, the plant must be kept above 65 degrees or the buds will turn yellow and drop. Do not overwater and water at the base of the plant rather than overhead. Also do not allow to sit in water as this leads to root rot. Water until it flows out the drainage holes in the bottom before setting it another container if it is in a pot within a pot.