Dracaena
Botanical family: Agavaceae
This is a large genus that includes plants of varying sizes and leaf colourations, many of which are used in tropical gardens. Tolerant of neglect, it can be seen as a house plant or in garden areas that receive little attention. D. reflexa (also know as Pleomele reflexa, Song of India) has small, narrow leaves which may be dark green or have bright yellow margins.
From the third picture onwards, it is the Dracaena marginata, sometimes listed as Dracaena concinna, which has long flat leaves striped wit red or purple. Though it can grow quite tall, it is more often seen in lower masses to bring colour to a garden.
In genereal, Dracaema prefers partial to full sunlightm though green leaved forms will do well in shady locations.