Apps similar to PDF Vole include PDFedit, which is free and open source. Other options are PoDoFoBrowser and PDFTron PDF CosEdit. In total there are three PDF Editors like PDF Vole for Windows and Linux.
Free (and open source) editor for manipulating PDF documents. GUI version + commandline interface. Scripting is used to a great extent in editor and almost anything can be scripted, it is possible to create own scripts or plugins.
PDF CosEdit is a stand-alone, low-level PDF editor. It is an essential power tool for professionals working with PDF, FDF, and PJTF. Manual editing of PDF files can be extremely difficult or impossible.
