Any plant that wants 8+ hours of direct sunlight, or 6+ hours of intense afternoon sun.
Some examples are:
Full Sun Hanging Baskets, Patio Containers and Window Boxes
These plants can be planted into any container in a full sun location. Since they tolerate full sun (with enough water and food) they will survive just fine in our Colorado Summers!
Smaller flowered varieties like purslane or portulacas do well in windy locations.
Portulaca (Moss Rose): Double flowered and wildflower mix.
Calibrachoa: Also called mini petunia or million bells, great heat tolerant plant and low maintenance needed.
Petunia: Cascade and uprights, keep tops pinched otherwise plant will overgrow.
Verbena: Red, pink, purple, Aphrodite (lavender), lots of water and food.
Geraniums: Most zonals, pink and red minicascade.
Gazanias: Bright colored daisy-like flowers, good in the heat.
Vinca (Annual Periwinkle): Glossy green foliage, pink or white flowers
Sanvitalia: Tiny daisy like flowers, lots of water
Lantana: Uprights and spreaders, needs lots of water