Coleman featured for Scunthorpe United before embarking on the non-league scene with Gainsborough Trinity, Ilkeston and Stocksbridge Park Steels.
Smijanic joins the Gingerbreads having been on the books with Manchester United and Barnsley, before spending three years in the USA playing for Atlanta. He joins the club from Stocksbridge Park Steels.
Scrivens scored more than 30 goals in all competitions before trailing with Scottish club Partick Thistle and Chesterfield. When at Penistone, he bagged 27 league goals in a season before moving up the football pyramid, with his former clubs including Matlock Town and Guiseley.
Parkin, a midfielder, and forward Sylla have also joined the club.
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