TackIt is © 2025-2026 TackIt. All rights reserved. The TackIt name, interface and original code are the property of TackIt.
TackIt is built on the open-source work below. Each is used under its own licence, and the required copyright notices are reproduced here in full.
Open-source components
Reading text out of images (OCR).
© 2015 Kevin Kwok and contributors
Licensed under the Apache License, Version 2.0. A copy is at https://www.apache.org/licenses/LICENSE-2.0
Drawing charts.
© 2014-2024 Chart.js Contributors
Reading and writing .zip files, which is how .docx import works.
© 2009-2016 Stuart Knightley and contributors
JSZip is dual licensed MIT or GPLv3. TackIt uses it under MIT.
Converting Word documents into notes.
© 2013 Michael Williamson
The Pro calculator's symbolic algebra — solve, factor, integrate.
© 2013-2021 Martin Donk
The icon set used throughout the interface.
© for Lucide: 2022 Lucide Contributors. For portions from Feather: © 2013-2022 Cole Bemis.
Lucide is a fork of Feather Icons (MIT). Both notices are reproduced above as the ISC licence requires.
InterSIL Open Font License 1.1 The interface typeface.
© 2016-2020 The Inter Project Authors
The display typeface.
© 2020 The Fraunces Project Authors
Fonts
Inter and Fraunces are served by Google Fonts under the SIL Open Font License 1.1, which permits use and embedding in this way.