Open Source Tax Software

• UsTaxes

  51 1,383 8.7 TypeScript

  Tax filing web application

  

Here's the GitHub repo of one of the projects mentioned in the article: https://github.com/ustaxes/UsTaxes

• openfisca-france

  3 245 9.8 Python

  French tax and benefit system for OpenFisca

  

The french initiative started in 2013 is still alive (last commit a few days ago), and passes the gov test suite (they keep in touch with our version of the IRS): https://github.com/openfisca/openfisca-france

The way we got this is interestingly twisted.

French citizens requested the software used by the administration, and they managed to get it!

But, it's was written in Mlang is a proprietary language created by the french administration in the 90: https://github.com/MLanguage/mlang.

Someone then decided to create an OCaml compiler that takes mlang and emits python: https://arxiv.org/abs/2011.07966

As a result, we got we got open fisca. I know believe there are other techs in the mix...

A slide of the story: https://www.slideshare.net/Etalab/opening-up-the-french-tax-...

• InfluxDB

  www.influxdata.com featured

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• mlang

  7 175 9.1 OCaml

  Compiler for the M language, used to compute the income tax of French taxpayers

  

The french initiative started in 2013 is still alive (last commit a few days ago), and passes the gov test suite (they keep in touch with our version of the IRS): https://github.com/openfisca/openfisca-france

The way we got this is interestingly twisted.

French citizens requested the software used by the administration, and they managed to get it!

But, it's was written in Mlang is a proprietary language created by the french administration in the 90: https://github.com/MLanguage/mlang.

Someone then decided to create an OCaml compiler that takes mlang and emits python: https://arxiv.org/abs/2011.07966

As a result, we got we got open fisca. I know believe there are other techs in the mix...

A slide of the story: https://www.slideshare.net/Etalab/opening-up-the-french-tax-...

• Keka

  29 4,428 9.1 PHP

  The macOS & iOS file archiver

Two quick examples: Keka and Textual[2] are both open-source and you can pay for them on the Mac App Store or by direct payment. The former gives you compiled builds either way, the latter only if you pay.

[1]: https://github.com/aonez/Keka

[2]: https://github.com/Codeux-Software/Textual

• Textual

  8 1,845 5.7 Objective-C

  Textual is an IRC client for OS X (by Codeux-Software)

  

Two quick examples: Keka and Textual[2] are both open-source and you can pay for them on the Mac App Store or by direct payment. The former gives you compiled builds either way, the latter only if you pay.

[1]: https://github.com/aonez/Keka

[2]: https://github.com/Codeux-Software/Textual

• policyengine-uk

  2 22 8.9 Python

  The UK's only open-source static tax-benefit microsimulation model.

  

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