I love what Sweet Georgia Yarns does with their Pary of Five yarn sets. 

Take a look at this design (on Ravelry), Gimli Peak, for a marvelous pattern using these yarns. 

I quote here:

Give your next knit, crochet, or weaving project a splash of colour or gradient effect with a ready-to-go collection of on-trend hues.

Each Party of Five mini-skein set contains five 105-yd / 96 m hand-dyed skeins in our popular Tough Love Sock yarn (80% Superwash Merino, 20% Nylon).

With 525 yds / 480 m, you have the perfect amount for shawls, cowls, scarves, and even the colourwork section of your favourite yoked sweater pattern.

Here we have their Fruit Salad set, composed of Dragon Fruit, Watermelon, Chili Papper, Mandarin, and Papaya. 

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I came upon Ambah O'Brien's newest pattern, the Triangonal Shawlette, and notice that it requires a set of five mini-skeins.  These would be perfect!

And look at this Sunspotter! There are a few in the Project Pages that used a Party of Five set. 

If you'd like a few other suggestions for designs that would work well with these, just ask.