sort { $hash{$a} <=> $hash{$b} } values %hash;

##</code><code>##

# list of sorted keys in numeric order
my @keys = sort { $a <=> $b } keys %hash; 

# list of values in numeric order
my @values = sort { $a <=> $b } values %hash; 

# a list of the *keys* sorted by their corresponding value
my @keys_by_value = sort { $hash{$a} <=> $hash{$b} } keys %hash;