Plucker is an open-source offline e-reader for PDAs, and the associated Plucker file format. The Plucker software suite includes a supporting desktop application for creating Plucker files and transferring them to supported devices.
Plucker was designed for late-1990s and early-2000s low-power handheld devices such as the Palm Pilot, before the advent of widespread wireless internet and internet-enabled mobile devices. Plucker uses an extensible plugin design to convert content from file formats and web-based formats into a compact Plucker file with formatted text and embedded images, for offline mobile reading.