In addition to the country filter, a collection can now be sorted by country, date when a coin was added, year or popularity.

You can also specify sort options in your collection URL link:

Sort by country:
http://www.omnicoin.com/?collection=Pilgrim&sort=country

Sort by year:
http://www.omnicoin.com/?collection=Pilgrim&sort=year

Sort by date added:
http://www.omnicoin.com/?collection=Pilgrim&sort=date

Sort by popularity:
http://www.omnicoin.com/?collection=Pilgrim&sort=popularity

Clicking on any sort option again will reverse the order.

All sort options should work with a country filter applied. For example, you can find what coins are most popular within a specific country in your collection.