Normally I don't really like the look of shrubs and trees planted in the middle of lawns with no connection between them - they are each their own little island floating adrift in a sea of turf grass. But right now they look spectacular and all is forgiven! From left to right in the photo above:
a red viburnum; an orangey-red hedge of cotoneaster in the background; a green lilac just starting to change colour; a yellow nanking cherry; and a red crabapple (probably Thunderchild?)
Here's one more view 'cause they're just so godd#m gorgeous right now:
Some more of mine (in addition to the ones above) include the Sorbus spp. (Mountain Ash tree), Aesculus glabra (Ohio buckeye), Acer ginnala (Amur maple), Acer tataricum (Tatarian maple), Euonymus alata (winged burning bush), Euonymus nana 'Turkestanica' (Turkestan burning bush) and Cornus spp. (dogwoods).
Close-ups of leaves help if you're trying to identify something, so also check out this post at Gardening zone 3b.