Just when I was ready to give up on seeds . . .

Squash & Melons in TP tubes (idea- I vaguely recall- from the book Grow Great Grub)

Basils - Lemon, Opal, Cinnamon & Genova (in re-purposed yogurt and sour cream containers)
You can barely see them, but the Brandywine & Green Zebra tomatoes, and both the purple and green varieties of tomatillo are also sprouting in the often reused party cups