Pentomino

A pentomino is a 2D shape made out of 5 side-by-side equal-sized squares. They can be found in the books Chasing Vermeer and The Wright 3. It was created by Solomon W. Golomb.

These are the 12 pentominos:

Pentomino Media

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The 12 pentominoes can form 18 different shapes, with 6 of them (the chiral pentominoes) being mirrored.
Comparison of labeling schemes for the 12 possible pentomino shapes. The first naming convention is the one used in this article. The second method is Conway's.
Three pentomino puzzle solutions.
Unsolvable pentomino puzzles.
Sample solutions to pentacube puzzles of the stated dimensions, drawn one layer at a time.
Решение задачи об одновременном утроении всех 12 фигур пентамино 9 комплектами фигур
All 8 rotations and reflections of the F-pentomino (4 rotations of each reflection)
All 8 rotations and reflections of the L-pentomino (4 rotations of each reflection)
All 8 rotations and reflections of the N-pentomino (4 rotations of each reflection)
All 8 rotations and reflections of the P-pentomino (4 rotations of each reflection).

Other websites

All about pentominoes Archived 2008-05-11 at the Wayback Machine