Nestalgia vs OpenInvoice

Nestalgia is a work-in-progress emulator for NES and Famicom systems, built in Kotlin for Linux, macOS and Windows. It also emulates Famicom Disk System, Dendy, Vs. System, NSF and NSFe, and lists support for 305 mappers. The emulator includes save states, battery saves, overclocking and cheat codes, along with fullscreen display and screenshots. Audio, video, controller and emulation settings are configurable. More than 20 controllers are supported, including the NES Controller, Zapper, Power Pad and Four Score. The project lists passing CPU, video, audio, mapper and input accuracy tests. Windows, Linux and Mac downloads require Java 21 or newer. The project is free and open source under GPL-3.0, with no plan limits stated. Android is listed with an uncertain “Coming soon...or not :(” status. Developers can add its core library through JitPack using Gradle instructions. Nestalgia implements the emulator but does not include debugging tools.

OpenInvoice extracts structured information from PDF and image invoices, then lets users check the results against the source document, correct fields, and export CSV or JSON. It identifies supplier and client details, invoice number, date, totals, tax, currency, SIRET, VAT number, client number, and line items. Processing starts with regular-expression patterns and invoice2data templates, using a MiniMax M2.7 language model only when required fields remain missing. The project lists English, French, German, and Swiss formats and more than 190 vendor templates. Its dashboard tracks processing volume, success rates, supplier distribution, and language-model costs. The API covers extraction, webhook ingestion, document management, CSV export, dashboard statistics, and quality metrics. Typical connections include Microsoft Teams, Outlook or email through Power Automate, OneDrive or SharePoint, and webhooks. OpenInvoice can run on customer infrastructure and connect to ERP, accounting, Microsoft 365, and email systems. The code is free and open source; deployment, integration, and ongoing support are paid services.