wkhtmltopdf and wkhtmltoimage are open source command line tools that render HTML into PDF and image formats using the Qt WebKit rendering engine. They run headless without a display or display service. A C library, libwkhtmltox, offers bindings for PDF and image conversion.
Dangerzone is a free and open source project maintained by Freedom of the Press Foundation. It converts potentially dangerous PDFs, office documents, or images to a safe PDF. Documents are sanitized in a sandbox with no network access, and the document is converted into pixels and rebuilt as a PDF.
PDF4QT is an open source PDF editor for Windows and Linux under the LGPLv3 license. It offers applications for viewing, editing and rendering PDF documents, plus a C++ library and command line tool for developers. Features include digital signature verification, annotation editing and page organization such as merging and splitting.
PDFEncrypt is a free, open-source native Windows app that encrypts PDF files using standard PDF encryption algorithms. Users specify a password required to open the document along with options and permissions for the PDF. Encryption runs locally on the Windows PC rather than uploading files to a third-party server. The app uses the iTextPDF library and is released under the AGPL license.
SDelete is a command-line Sysinternals utility that securely overwrites existing files and cleanses free space on a logical disk, including data in unallocated portions. It accepts wildcard characters in file or directory specifiers and implements the Department of Defense clearing and sanitizing standard DOD 5220.22-M. The tool securely deletes file data but not file names located in free disk space.
FreeFileSync is a free open source data backup application for comparing and synchronizing files and folders on Windows, macOS and Linux. It determines differences between a source and target folder and transfers only the minimum data needed rather than copying every file. The website also references a separate Business Edition available for license extension.
Recoll is a desktop document search application for Unix, Linux, Microsoft Windows and MacOS, built on the Xapian search engine library. It finds documents based on their contents as well as their file names and can search most document formats. The software is free on Linux, open source, and licensed under the GPL.
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Dangerzone is a free and open source project maintained by Freedom of the Press Foundation. It converts potentially dangerous PDFs, office documents, or images to a safe PDF. Documents are sanitized in a sandbox with no network access, and the document is converted into pixels and rebuilt as a PDF.
PDF4QT is an open source PDF editor for Windows and Linux under the LGPLv3 license. It offers applications for viewing, editing and rendering PDF documents, plus a C++ library and command line tool for developers. Features include digital signature verification, annotation editing and page organization such as merging and splitting.
PDFEncrypt is a free, open-source native Windows app that encrypts PDF files using standard PDF encryption algorithms. Users specify a password required to open the document along with options and permissions for the PDF. Encryption runs locally on the Windows PC rather than uploading files to a third-party server. The app uses the iTextPDF library and is released under the AGPL license.
SDelete is a command-line Sysinternals utility that securely overwrites existing files and cleanses free space on a logical disk, including data in unallocated portions. It accepts wildcard characters in file or directory specifiers and implements the Department of Defense clearing and sanitizing standard DOD 5220.22-M. The tool securely deletes file data but not file names located in free disk space.
FreeFileSync is a free open source data backup application for comparing and synchronizing files and folders on Windows, macOS and Linux. It determines differences between a source and target folder and transfers only the minimum data needed rather than copying every file. The website also references a separate Business Edition available for license extension.
Recoll is a desktop document search application for Unix, Linux, Microsoft Windows and MacOS, built on the Xapian search engine library. It finds documents based on their contents as well as their file names and can search most document formats. The software is free on Linux, open source, and licensed under the GPL.
