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> Index of every page on this site: [llms.txt](https://claritytech.io/llms.txt)

# **Software we built, free for you to use. **

Some of what we build solves problems other teams have too. We publish it under the MIT licence, so you can use it, read the code and change it.

## **InvoiceInk **

Invoicing for businesses that bill across currencies and tax systems.

Invoices, estimates and payments in nine currencies, with GST and VAT built in. Customers get branded PDFs and links they can open without an account. The hosted app is free to use, or you can run it yourself.

- Laravel
- Vue
- TypeScript
- MySQL

[**About InvoiceInk **](https://claritytech.io/open-source/invoiceink/) [**Sign up free **](https://invoiceink.claritytech.io/register) [**Source on GitHub **](https://github.com/clarity-tech/invoiceInk)

## **php-focal-backports **

PHP security fixes for Ubuntu 20.04, where the usual packages stopped.

We built it to patch PHP2Shell on a client's servers. It rebuilds the PPA's own signed, fixed packages, unchanged, for PHP 7.4 to 8.4 on arm64 and amd64. Prebuilt bundles come with build provenance and an installer that simulates before it changes anything.

[**Read how we built it **](https://claritytech.io/posts/patching-php2shell-on-ubuntu-20-04-arm64/) [**Source on GitHub **](https://github.com/clarity-tech/php-focal-backports)

```
# Verify where a bundle came from, then dry-run it
gh attestation verify <bundle>.tar \
  --repo clarity-tech/php-focal-backports

sudo bash install.sh simulate '<bundle URL>' <sha256>
sudo bash install.sh apply    '<bundle URL>' <sha256>
```

## **Want help with one of these? **

We can adapt InvoiceInk to how your business works, or patch the PHP servers you depend on.

[**Talk to us **](https://claritytech.io/contact-us/) [**See everything on GitHub **](https://github.com/clarity-tech)

![Clarity Technologies](https://claritytech.io/logo.svg)

We strive for nothing less than the Perfection & Quality.

Understands your business and delivering Future.

[GitHub](https://github.com/clarity-tech) [LinkedIn](https://www.linkedin.com/company/clarity-tech)

# **Quick Links **

- [Home](https://claritytech.io/)
- [About Us](https://claritytech.io/about-us)
- [Open Source](https://claritytech.io/open-source)
- [Career](https://claritytech.io/career)
- [Contact Us](https://claritytech.io/contact-us)

# **Legal **

- [Privacy Policy](https://claritytech.io/privacy-policy)
- [Terms of Service](https://claritytech.io/terms-of-service)
- [WCAG Standards](https://claritytech.io/wcag-standard)
- [WCAG 3.0 (Future)](https://claritytech.io/wcag3-intro)

© 2026 Clarity, Technologies. All rights reserved.

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## Sitemap

See the full [sitemap](https://claritytech.io/sitemap.md) for all pages.