Opia documentation
Third-party Notices
Licence and attribution summary for software redistributed with Opia.
Applies to Opia 26.8.1Overview
Opia includes third-party libraries, frameworks, runtime components and open-source software. Each third-party component remains subject to its own licence terms; the Opia EULA does not replace or override them.
Nu-topia Solutions Ltd. acknowledges the rights of third-party copyright holders. The complete exact-version licence and notice collection accompanies the Software offline.
Runtime and application components
The following table summarises the components redistributed by the Opia App, Agent, MSI or offline setup. The installed dependency manifest provides the full per-package mapping.
| Component | Version | Purpose | Licence and attribution | Distribution note |
|---|---|---|---|---|
| .NET self-contained Windows runtime, WPF, Microsoft.Extensions, Entity Framework Core, Microsoft.Data.Sqlite and Microsoft system support packages | 10.0.10, except System.Security.Cryptography.Pkcs 10.0.0 | Windows desktop runtime, hosting, data, configuration, logging and service support. | MIT. Copyright .NET Foundation and Contributors and/or Microsoft Corporation, as identified by each package. | The final App, Agent and bootstrapper payloads include the exact runtime LICENSE.TXT, THIRD-PARTY-NOTICES.TXT and package notices. Microsoft.Extensions.Hosting.WindowsServices 10.0.10 is part of the Agent runtime. |
| CommunityToolkit.Mvvm | 8.4.2 | Desktop MVVM infrastructure. | MIT. Copyright .NET Foundation and Contributors. | The package's License.md and ThirdPartyNotices.txt are retained. |
| SQLitePCLRaw and SourceGear.sqlite3 / SQLite | 3.0.3 and 3.50.4.5 / SQLite 3.50.4 | Managed and native local database provider. | Apache License 2.0 for SQLitePCLRaw. SQLite is dedicated to the public domain; SourceGear package metadata identifies Copyright 2014–2025 SourceGear, LLC. | The Apache text and SourceGear package LICENSE.txt are retained. |
| Serilog family | 4.3.1; Hosting 9.0.0; Logging 9.0.0; Compact 3.0.0; Configuration 10.0.0; File 7.0.0 | Structured diagnostic logging. | Apache License 2.0. Copyright Serilog Contributors. | The Apache-2.0 text and package metadata are retained. |
| SSH.NET | 2026.0.0 | SSH connectivity for network devices. | MIT. Copyright Renci 2010–2026. | The MIT text and copyright metadata are retained. |
| MailKit, MimeKit and BouncyCastle.Cryptography | 4.16.0, 4.16.0 and 2.7.0 | Email notification transport and its cryptography dependency. | MIT. Copyright .NET Foundation and Contributors and Legion of the Bouncy Castle Inc. 2000–2026, as applicable. | The MIT text, package metadata and Bouncy Castle LICENSE.md are retained. |
| Quartz family | 3.18.0 | Scheduling and job orchestration. | Apache License 2.0. Copyright Marko Lahma and contributors. | The Apache-2.0 text and package metadata are retained. |
| DiffPlex | 1.9.0 | Configuration comparison. | Apache License 2.0. DiffPlex contributors. | The declared Apache-2.0 terms are retained. |
| QuestPDF | 2026.2.4 | Topology PDF and report generation. | QuestPDF Community License 3.0, effective 6 July 2026. Copyright Marcin Ziąbek and QuestPDF contributors. QuestPDF is source-available commercial software, not MIT-licensed software. | Nu-topia Solutions Ltd. has recorded eligibility for the selected Community tier and Opia selects LicenseType.Community. Commercial application use and royalty-free compiled redistribution are permitted while eligibility continues. Reassess on eligibility, package-version or applicable-terms changes. |
| QuestPDF native dependency closure | As bundled by QuestPDF 2026.2.4 | Native PDF, graphics, compression and compiler runtime support. | Package-provided notices cover emsdk, expat, HarfBuzz, libgrapheme, libjpeg-turbo, libpng, libwebp, Ninja, qpdf, Skia, Wuffs and zlib under their stated terms. | Every exact ExternalDependencyLicenses file supplied by the pinned package is retained. |
| Lato font family | Bundled font files | Document rendering fonts. | SIL Open Font License 1.1. Copyright 2010–2014 tyPoland Łukasz Dziedzic; reserved font name “Lato”. | The MSI installs LatoFont\OFL.txt beside the font files and includes the same text in the installed collection. |
| WiX Toolset Burn engine and BootstrapperApplicationApi | 7.0.0 | Offline setup engine and bootstrapper host API. | Microsoft Reciprocal License (MS-RL), with the binary package's separate Open Source Maintenance Fee Agreement (OSMFEULA.txt). Copyright .NET Foundation and contributors. |
The setup redistributes the Burn engine/stub, WixToolset.BootstrapperApplicationApi.dll and mbanative.dll. The collection preserves MS-RL, OSMF EULA v1.1 and the WiX 7.0.0 corresponding source record for release tag v7.0.0, package source commit b8977d6f88e7b68e000bac226a2814f236770570. First-party Opia bootstrapper code does not become MS-RL merely by using the API. |