Poppler

PopplerDocument — Information about a document
PopplerPage — Information about a page in a document
PopplerAction — Action links
PopplerAttachment — Attachments
PopplerFormField — Form Field
PopplerAnnot — Annotations
PopplerLayer — Layers
PopplerMedia — Media
PopplerMovie — Movies
PopplerStructureElement — Document structure element.
PopplerColor — Colors
Error handling — Error domain and codes
PDF Utility functions
Poppler Features