This coat of arms was recently granted (or approved for granting) to the newly-amalgamated city of Kingston. The main feature of the shield is the Martello tower over waves- a clear reference to the landmark cannon towers built for the defence of Kingston (and area) in the 1840's, when it appeared that there might be a repeat of the American invasion of the War of 1812. The crowns above the tower represent loyalty to the monarch as well as the city's name (King's town- fairly obvious); there are now three of them to represent the three municipalities (Kingston, Fort Henry, and Fort Frederick) which were recently fused. This also mirrors the three crowns in the arms of the city's namesake, Kingston-Upon-Hull. The crest (a beaver) is a symbol for (nearly a cliche) for Canadian industry, and the motto (Antiquitate, Civilitate, Humanitate) is rather typical for a Canadian city, and replaces "For the King, the People, and the Law". The griffin as a supporter represents the explorer Frontenac, who ordered that the area be settled (his arms had three gold griffin's feet), while the lion is taken from the Dominion's arms (Kingston was briefly the seat of government of Canada, hence also the collars of red maple leaves).
The flag and badge are derived from the arms.

Description courtesy of John Coo of the Royal Military College, the arms image was modified from the one below by me (yeah, I know, I did a terrible job with the collars. Sorry).

The pre-amalgamation arms of the city of Kingston are obviously the inspiration for the new arms, with the main difference being the presence of only one crown. The supporters were also originally charged with a single maple leaf, and the motto has changed. This picture is taken from Beddoe's Canadian Heraldry.