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501 Tangram Challenges 1.2 Are you ready to face 501 challenges of the classic Tangram puzzle? Solve hundreds of built-in challenges, construct your own Tangram
| | CheckBook 2.1 Manage your checking accounts with this inexpensive tool. CheckBook 2.1 uses a simple interface to enter and balance your checking account
| | Lissajous 3D 1.3 Make animated swirly patterns which change shape. You can use real materials such as gold, pearl, ruby. Many demo curves included, and you
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