Platform · C# and .NET

Windows software and desktop applications with C# and .NET

Our desktop programs are built with C# on modern .NET and run natively on Windows 10 and 11. They start fast, keep your data on your own PC and need no cloud account. Our first product is Zyloft Desk, invoicing software for freelancers and small businesses.

Our software for Desktop software

Zyloft Desk overview: open and overdue invoices, VAT for the quarter, revenue and unbilled hours

Invoicing software for Windows

Available now

Zyloft Desk

Quotes, invoices and e-invoicing for freelancers, the self-employed and small businesses in Germany. Works offline on your own PC, no subscription.

ZUGFeRD 2.3 and XRechnung 3.x
Invoices under §14 UStG, gapless numbers, cancellation invoices
All data stays local on your PC

C# · .NET · WPFWindows 10 & 11

Why C# and .NET

.NET is mature, actively maintained by Microsoft and strongly typed. That suits software that handles money, documents or legal requirements and has to stay reliable for years.

With WPF and a modern Fluent design, our programs look at home on current Windows versions while still running well on older, everyday PCs.

What you can expect

Native Windows programs for Windows 10 and 11
Your data stored locally, with encrypted backups
Installer with automatic updates
No account, no login, no ads

Planning a Windows application of your own?

For selected projects we also build custom desktop software: Windows applications with WPF, databases with EF Core, PDF and e-invoicing features, or modernising existing .NET Framework applications.

Project support