This page points to external listings as well as providing a place to describe different approaches for converting existing tabular data (spreadsheets and CSV files, mostly) to RDF.
References gleaned from the public-semweb-lifesci@w3.org list:
Rafael Richards: Healthcare data published by the CDC unfortunately comes as nearly 200 separate spreadsheets:
We also make Anzo available for free for academic use.
Jim McCusker: Tim Lebo's csv2rdf4lod is designed for repeatability and scalability. It was developed to handle transforming the data from data.gov into RDF, and has been set up to automatically convert thousands of datasets. We even have one project that regularly updates conversion configurations from github and be converted and loaded into a triple store automatically via cron. Further, it supports dataset versioning, where you can keep multiple versions of data around without URI collisions. It also supports re-using conversion configurations for multiple files that share a common format.
Tim Lebo maintains a Alternative Tabular to RDF Converters page on Github.
Eric Gombocz: IO Informatics’ Knowledge Explorer. Professional Edition, also provides an automated way to facilitate import and updating a triplestore backend of your choice via monitored folders which will map and import incoming spreadsheets to RDF. You can set up multiple monitored folders with different data mappings, and this will run as background processes to continuously update one or multiple connected triplestores (or different graphs in a single triplestore.
The Knowledge Explorer also provide scripting within the import mapping, application of thesauri and other mechanisms for data transformation to clean, consolidate and harmonize data during the import.
You can find out more about this tool here: http://www.io-informatics.com/products/sentient-KE.html
Peter Ansell: Michel Dumontier's php-lib library is what Bio2RDF has been using for converting TSV, CSV files (and other file formats) to RDF [1]. It contains some aspects that are Bio2RDF specific, namely its support for prefixed URIs, but any Pull Requests on GitHub would be appreciated to generalise that. OSX has PHP installed by default as far as I know so you can use it on the command line without any other dependencies.
You can find examples of scripts using php-lib in the bio2rdf-scripts repository on GitHub [2]. A fairly simple example would be the HGNC converter, which is Tab separated, but quite similar [3].
[1] https://github.com/micheldumontier/php-lib
[2] https://github.com/bio2rdf/bio2rdf-scripts
[3] https://github.com/bio2rdf/bio2rdf-scripts/blob/master/hgnc/hgnc.php#L129
Katy Wolstencroft: Our tool, RightField (http://www.rightfield.org.uk), allows you to embed ontology term selection into spreadsheets, and to extract these selections as RDF. It is designed more for assisting in the data collection process (i.e. when users fill in a spreadsheet that has been marked-up using RightField, they are automatically collecting semantically enriched data).
Our paper from last year's eScience conference describes the RDF extraction in more detail:
Wolstencroft, Katherine; Owen, Stuart; Goble, Carole; Nguyen, Quyen; Krebs, Olga; Muller, Wolfgang; , "RightField: Semantic enrichment of Systems Biology data using spreadsheets," E-Science (e-Science), 2012 IEEE 8th International Conference on , vol., no., pp.1-8, 8-12 Oct. 2012
doi: 10.1109/eScience.2012.6404412