OSS Discovery

SE
Sweden
PRODUCTIVITY & KNOWLEDGE
CLOUD-READY
ACTIVELY MAINTAINED
PAID
Kalker

KALKER

Kalker is a premium scientific calculator enabling advanced math with user-defined variables, functions, differentiation, integration, and complex numbers. Cross-platform (Windows, macOS, Linux, Android, WebAssembly) for precise computations in engineering, research, and education.

GITHUB STARS
1.9k
+12% this month
FORKS
79
Active community
LAST PUSH
Apr 24, 2026
High momentum
WATCHERS
20
Tracking updates
LICENSE
MIT
Commercial use
Kalker is a premium scientific calculator enabling advanced math with user-defined variables, functions, differentiation, integration, and complex numbers. Cross-platform (Windows, macOS, Linux, Android, WebAssembly) for precise computations in engineering, research, and education.

High Performance

Built for speed and minimal overhead.

Self-hostable

Docker, Kubernetes, or bare metal

Developer Native

Programmable via any language workflow

SUPPORTED LANGUAGES

Rust
Rust
Svelte
Svelte
TypeScript
TypeScript
HTML
HTML
Python
Python
Nix
Nix
Shell
Shell
JavaScript
JavaScript
Java
Java
Sass
Sass
CSS
CSS

VISUAL INTERFACE

Screenshot 1
Screenshot 2
Screenshot 3

The Quick Glance

Status
Active
Category
Productivity & Knowledge
Pricing
Paid
Self-Hosted
No
Available on
Windows
macOS
Linux
Latest Release
v2.2.2
Sep 4, 2025

Relative Standing — across 1,284 tools

STARS1.9k
Top 67% globally
FORKS79
Top 78% in Open Source
ACTIVITYModerate
Top 66% Activity
WATCHERS20
Top 67% Community