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SPECIFICTION
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HalfNES vs OpenInvoice

HalfNES

github.com

OpenInvoice

github.com

Side by side

FigureHalfNESOpenInvoice
Price fromFreeFree
Free planYesYes
Free trial——
Open source——
Web—Yes
WindowsYes—
macOSYes—
LinuxYes—
API—Yes
Self-hosted—Yes
Plans published11
Spec score · NES Emulators8.0 (#6)7.3 (#16)
PurposeHalfNES is an accurate NES/Famicom emulator.OpenInvoice extracts structured data from PDF or image invoices.

Plans

HalfNES

  • HalfNESFree

HalfNES pricing →

OpenInvoice

  • OpenInvoiceFree

OpenInvoice pricing →

In their own words

HalfNES

HalfNES is a free NES and Famicom emulator for Linux, macOS, Windows, and other Java-compatible platforms. It supports the mapper numbers listed in its README, and says nearly all US releases will start, though some can show corrupted graphics or freeze. Its audio features include a sound core and an NSF player; display options include full screen and an NTSC filter. Controls can be remapped in Preferences, and joysticks work through DirectInput and xInput. HalfNES supports battery saves, but not savestates. GitHub releases provide a Windows executable and a JAR for other platforms, and both require Java 8 or newer. Linux users need to set execute permission on the JAR. Gamepads must be connected before a game loads to be detected, and their buttons cannot be configured. PAL games are supported but may have more issues; users need to select PAL in Preferences. The README gives a 2 GHz Athlon 64 or better as the requirement for full-speed play across all games, and notes that the NTSC filter needs substantially more processing power.

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OpenInvoice

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.

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