Imposer Pro for InDesign for Mac

From ALAP:

Imposer Pro is a plug-in for Adobe InDesign that imposes document pages into printer flats. Imposer Pro offers six sheet types (2-Up, 4-Up, 8-Up, 2-Up Consecutive, 3-Up Consecutive, and 4-Up Consecutive), four binding types (Saddle Stitch, Perfect Bound, Stacked, and None) and five imposition types (Standard, Work and Turn, Work and Tumble, Split Web, and Sheet Wise). To meet all your imposition needs ? such as using different imposition methods for the same document ? you can choose which pages to impose and how many signatures to create.
Imposer Pro compensates for bleed, creep, crossover trapping, number of sheets, plate margins, page gaps, and spread gaps, according to your specifications. You can also use Imposer Pro to add printer?s marks, including crop marks, registration marks, bleed marks, gray bars, color bars, page information, and custom text. In addition, Imposer Pro lets you print documents in tiles.