A few boxes drawn with Unicode box drawing characters:
╔═╦═╗
╠═╬═╣
║ ║ ║
╚═╩═╝
┏━┳━┓
┣━╋━┫
┃ ┃ ┃
┗━┻━┛
┌─┬─┐
├─┼─┤
│ │ │
└─┴─┘
╭╮
╰╯
No idea WTF this is useful for, but whatever.
╳
╱ ╲
╲ ╱
╳
╱ ╲
▏ ▕
▔▔▔
─
━
│
┃
┄
┅
┆
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┊
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┌
┍
┎
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└
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┙
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├
┝
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┦
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┫
┬
┭
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┰
┱
┲
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┴
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┾
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╀
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╍
╎
╏
═
║
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╔
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╘
╙
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╛
╜
╝
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╠
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╰
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