A modern relational spreadsheet 🌈
An Excel-compatible spreadsheet you can run anywhere: a deterministic Rust engine for .xlsx, .xlsm and .ods with an Excel-style editor in WebAssembly — embeddable, collaborative, desktop and AI-agent ready.
Professional spreadsheet: C++20 engine compiled to WebAssembly, React UI, same binary in the browser and Node.js. Self-hosted.
FeatherOffice spreadsheet: opens huge .xlsx files in seconds, runs Excel VBA macros, formulas in Portuguese or English. Rust, native UI, fully local
Open-source online Excel: a self-hosted browser spreadsheet that opens and saves real .xlsx/.xlsm, runs Excel VBA macros and UserForms, and lets people edit the same workbook together live. Python engine (478 functions, dynamic arrays) + Reflex UI.
Free large CSV viewer for Windows. Opens CSV, TSV, JSONL, NDJSON and log files too big for Excel; only visible rows are kept in memory.
SheetForge — Free, Fast, Offline Microsoft Excel Alternative for Windows 10 & 11. 100% Free & Private Desktop Spreadsheet App. No Microsoft 365, No Subscriptions, No Login.
Free, open-source, native macOS spreadsheet app. Opens Excel files, 7.7 MB, Swift/AppKit + Rust.
Minimalist spreadsheet built on SQLite — sheets, cells & formulas stored as tables. Fast, portable, scriptable, LLM-friendly. Bridges spreadsheets and SQL for local analytics & AI workflows.
A spreadsheet you can download, use and own. Excel-like desktop app for macOS, Windows and Linux, built on Tachiko Work.
Libre (free and open-source) spreadsheet app with the Microsoft Excel UI and functionality, written in Rust
One command installs free Microsoft Office and Adobe alternatives on your Mac (Word, Excel, PowerPoint, PDF editor, Photoshop-style tools) and connects them to Claude Code and Claude Desktop over MCP. Checksum-verified, dry run, one-command uninstall. Apps by Storytold; installer by Qualixar.
GridCraft for Android — 100% offline open-source spreadsheet suite built with Rust, egui & WASM
Desktop CSV editor: open, filter, clean and rewrite large CSV files in place
Lightweight open-source spreadsheet for Windows, written in Rust: one small exe, familiar ribbon and keyboard shortcuts, opens and saves .xlsx
Invoice document intake, four AP financial controls, exception queue, HTML dashboard, 50k-row benchmark at 100% recall, PostgreSQL views. Python standard library only, CI green on 3.10-3.13.
Die chilligste Finanzübersicht im ganzen Internet – selbst gebaut, ohne Schnickschnack, mit Login, Dark Mode und smarter Übersicht. Für alle, die ihr Geld lieber im Griff haben als Excel öffnen.
No-code data workbench for consultants — joins, aggregations, time intelligence and 40+ operations in a single browser file
Professional ROI analysis framework for industrial automation investments with interactive calculator
OpenSheet: a fast, free, open-source .xlsx and .csv editor for macOS & Windows. Edit cells and formulas, find & remove duplicates, merge workbooks. No Excel, no cloud.
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