Message

Rice and Ball

Black and White

Frisbee

Pegasus

Black and Rust

Goethe

More Lights

Socrates

Not Reality

Spacious Skies

Lines

Amber Waves of Grain

Frisbee

Celestial Disaster

Meteor

Texture

Winter Lawn

Xmas Code

Free a tree into a freelist linked by left node, without recursion:

freetree(t)
struct node *t;
{
        struct node **p,*sv;
        sv=freelist; freelist=0; p=&freelist;
        for(*p=t; *p; p=&p[0]->left);
        while(t) {
                for(*p=t->right; *p; p=&p[0]->left);
                t=t->left;
        }
        *p=sv;
}

Snow

Ornaments

Electric Foucault

No Step

Claude Monet

Land Lilies

Trade Deficit

Capital Surplus

Koala Kinetics

Eats Shoots and Leaves

Savings Time Blowback

Stay

Tech Support

Dongle

Furrows

Grains

The Chess Player

Check

Chance

Opportunist