Lightweight and flexible command-line JSON processor
PDFCraft is a free, privacy-focused PDF toolkit
JSON Lint for PHP
PDF transformation/manipulation program + library
Split and merge PDF files on any platform
2D & 3D TeX-Aware Vector Graphics Language
Client for public libraries
XMLTV obtains and processes TV listings data
Easy lead sheets from text input
csv2odf can convert csv data to formatted spreadsheets and documents.
Cross-platform DICOM implementation
Read Cobol data files in Java
Dynamically loaded extension libraries for GNU AWK
Parse and decode METAR, TAF, SYNOP, BUOY, AMDAR and write data as XML
Set of BIN/CUE<->VCD conversion tools for FreeBSD & GNU/Linux
converts UTF-8 text files to other codepages and back
DAMO Blog Engine is a light posting articles, comment, ...
Extrect selected entries from LDIF files like grep