vGhostscript
vKea
vpdftohtml
vrtftohtml
vTextCat
vwvWare
vXlhtml
vXML::Parser
Postscript interpreter (Postscript plugin)
Keyphrase extraction program
PDF converter
(PDF plugin)
RTF converter for
(RTF plugin)
Detect languages and encodings
Word converter
(Word plugin)
Excel/Powerpoint converter (plugins)
Parses XML documents
Open source:
Greenstone uses …
vMG
vGDBM
vwget
vYAZ
vStemmer
vLucene
vGCC
vCVS
vPerl
vApache
Creates compressed full-text indexes and performs searches
Database used for metadata etc
Downloading pages from the Web when creating collections
Client and server implementation of Z39.50
English language stemmer
Alternative full-text indexer
C/C++ compiler
Version control system
Used for plugins etc
Web server