Other new arrivals include midfielder Gramoz Kurtaj from Czech club Banik Most while and 19-year-old striker Carlton Morris, who comes north on loan from Norwich City.
Nade, 30, scored six goals in 33 games for Raith Rovers last season, having first made his name in Scotland during three seasons with Hearts.
He said: “Thanks to Hamilton for giving me the opportunity to be back to the top league. I will work to stay in that league.”
Kurakins has spent the last four seasons with Ventspils in Latvia having failed to make a first-team appearance during three years at Celtic.
Kurtaj has been playing in the Czech Republic’s second tier while Morris’ move to New Douglas Park was sanctioned by former Accies boss Alex Neil.