The RDF::Tabular ruby gem provides one of the more robust and comprehensive implementations, supporting both translation and validation.

https://github.com/ruby-rdf/rdf-tabular/

CLI, Ruby

Check whether your CSV is well formed and to test it against a CSV dialect, JSON table schema or of course a CSVW annotation. A web service is available at csvlint.io.

https://github.com/Data-Liberation-Front/csvlint.rb

CLI, Web, Ruby

Translate CSV to RDF

https://github.com/Swirrl/csv2rdf/

Native (linux and mac), CLI, Java, Clojure

Generates CSVW annotations from CSV files to describe RDF Data Cubes.

https://github.com/swirrl/table2qb

CLI, Java, Clojure

Read and Write CSVW as Data Frames

https://github.com/Robsteranium/csvwr

R

CSV to RDF converter. The project also provides a web service and GUI.

Web, GUI, Python

A Python API to read and write relational, tabular data according to the CSVW specification.

https://github.com/cldf/csvw

CLI, Python

A Python CLI to write RDF Cube Vocabulary cubes from tidy CSVs and a basic json mark-up.

https://purl.org/csv-cubed/docs

CLI, Python