Extism

Extism

Dylibso
GridCraft

GridCraft

ArtCraft
+
+

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About

Extism is an open-source, universal plug-in system to make all software programmable, and it's powered by WebAssembly. In-depth documentation, constantly updated as the project grows. 15+ officially supported Host SDKs, making Extism embeddable in the most popular languages. 7+ officially supported PDKs, to write plug-ins in whichever language a developer would like. A growing set of runtime features makes Extism an excellent plug-in system for apps of all types & sizes. Fully-featured canonical reference demo with Elixir host SDK, and plugins in Rust, TypeScript, & Javascript. Implementation of a turn-based multiplayer game platform and games included to play and review. Games are implemented as WebAssembly modules containing a specific set of exports. Check out the source code on GitHub, download the installer, and get started. 100% open-source code. Fork it, experiment, & run your own game server.

About

GridCraft is an open-source spreadsheet application for creating, editing, calculating, and analyzing workbooks on desktop or in a browser. Its interface includes a ribbon, formula bar, and sheet tabs, with tools for formulas, dynamic arrays, tables, sorting, filtering, data validation, conditional formatting, charts, and PivotTables. It supports XLSX, CSV, and TSV workbooks, with comments, hyperlinks, print settings, and PDF output. Users can build budgets, schedules, sales summaries, and other data tables, then calculate and visualize results in a workbook. Desktop releases are available for Windows, macOS, and Linux; a WebAssembly build can be hosted on a static server. A command-line tool, JSON control channel, and Model Context Protocol server let developers and AI agents inspect, edit, calculate, and format workbooks programmatically. GridCraft is free, open-source software, and its maintainers currently describe the project as pre-alpha.

Platforms Supported

Windows Not Supported
Mac Supported
Linux Supported
Cloud Not Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Developers searching for a free solution to write plug-ins for apps of all types and sizes

Audience

People who need to create, edit, calculate, and analyze spreadsheets, including developers and AI-agent users who want to automate workbook tasks.

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

Free
Free Version Supported
Free Trial Not Supported

Pricing

Free
Free, open-source software dual-licensed under MIT or Apache-2.0, with no subscription or license-server requirement.
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Not Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Dylibso
United States
dylibso.com/products/extism/

Company Information

ArtCraft
github.com/storytold/gridcraft

Alternatives

AssemblyScript

AssemblyScript

The AssemblyScript Project

Alternatives

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4.8 out of 5 stars
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Categories

Categories

Spreadsheet Supported

Integrations

.NET Supported
AssemblyScript Supported
C Supported
C++ Supported
Erlang Supported
GitHub Supported
Go Supported
Haskell Supported
Java Supported
JavaScript Supported
Model Context Protocol (MCP) Not Supported
Node.js Supported
PHP Supported
Python Supported
R Supported
Ruby Supported
Rust Supported
TypeScript Supported
WebAssembly Supported
Zig Supported

Integrations

.NET Not Supported
AssemblyScript Not Supported
C Not Supported
C++ Not Supported
Erlang Not Supported
GitHub Not Supported
Go Not Supported
Haskell Not Supported
Java Not Supported
JavaScript Not Supported
Model Context Protocol (MCP) Supported
Node.js Not Supported
PHP Not Supported
Python Not Supported
R Not Supported
Ruby Not Supported
Rust Not Supported
TypeScript Not Supported
WebAssembly Not Supported
Zig Not Supported
Claim Extism and update features and information
Claim Extism and update features and information
Claim GridCraft and update features and information
Claim GridCraft and update features and information