Free Tools
Lasting change requires Action. Here you can find open source contributions and technical projects - both private and professional.
Work in Progress
I am constantly working on new tools. Check back soon for more!
Founder Personality
Personality assessment specifically for founders and startup teams.
A comprehensive personality assessment tool helping founders understand their strengths, weaknesses, and leadership style. Provides actionable insights for personal growth and team dynamics.
- ✓Detailed personality profile
- ✓Founder-specific trait analysis
- ✓Team compatibility insights
- ✓Leadership style assessment
- ✓Actionable growth recommendations
Contributing
The tool is currently not under active development. The GitHub repository is private but can be shared upon request. Direct feedback on the validity and utility of the assessment can be sent. Opportunities for collaboration to improve the assessment methodology are available. Note: Observe general limitations and validity concerns regarding personality tests.
Wonder-scribe Kids
Let children be the authors of their own stories and make decisions while they read.
An interactive storytelling platform that lets children become authors of their own adventures. Using AI-generated content, kids navigate through decision points that shape their unique stories, encouraging creativity while learning vocabulary.
- ✓Parental controls for age-appropriate content
- ✓Custom vocabulary integration (Lernwörter)
- ✓Character selection and creation
- ✓5-7 interactive decision scenes per story
- ✓Consistent AI-generated imagery
- ✓Lazy loading for fast start times (<20 seconds)
- ✓Back/forth navigation to explore different paths
- ✓Extended reading engagement (30+ minutes exploration)
Contributing
This tool has been archived due to high AI API costs. As a free, non-monetized tool, the ongoing expenses became unsustainable. However, the frontend code is available for copying and adaptation under the MIT license. Feel free to replicate the concept with your own AI implementation or adapt the interactive storytelling framework for other educational purposes.
Pitbulls Stats Hub
Web app that displays individual and team statistics for recreational sports teams, transforming public data into actionable insights for player development.
A sports analytics web application designed for recreational teams that processes and displays publicly available statistics in an aggregated, user-friendly format. The tool transforms raw data into actionable insights to guide player and team development.
- ✓Individual player statistics display
- ✓Team performance analytics
- ✓Data aggregation from public sources
- ✓Development-focused insights
- ✓Video section (PW-gated)
- ✓Google Drive backend for non-expert user input
Contributing
The code is available for copying, but users are recommended to wait for a clean version that will be developed specifically for forking. The tool will be released under MIT license for broader community use.
Agile Leadership Roles & Competence Assessment
Interactive guide to the 9 essential roles of an Agile Leader and scenario-based assessment to test your Agile Coach action competence with dynamic AI evaluation.
True agility requires a fundamental shift in leadership style. This comprehensive toolset helps you understand the nine key archetypes of an Agile Leader—from 'Protector' to 'Networker'—and puts your skills to the test. The integrated interactive assessment challenges you with realistic scenarios, using an AI coach to evaluate your responses against professional competency frameworks.
- ✓9 Essential Agile Leadership Archetypes
- ✓Realistic, multi-stage Agile Coach scenarios
- ✓AI-powered evaluation using Perplexity API
- ✓Detailed behavioral guides for each role
- ✓Downloadable PDF competence report
Contributing
This tool is a demonstration of advanced agentic workflows in education and assessment. Feedback on the scenario realism and AI evaluation accuracy is welcome.
AI Tool Evaluation Prompt Generator
Generate tailored prompts to evaluate AI tools based on your startup phase and business model. Helps you make informed decisions about AI tool adoption.
A specialized tool that generates customized evaluation prompts for AI tools based on your startup's current stage and business model. The AI tools landscape evolves so rapidly that specific tool recommendations become outdated within months. However, what remains robust is that startups have different non-functional requirements based on their business model and growth phase. This prompt generator helps you consider those critical circumstances when evaluating AI tools, ensuring you make decisions that align with your specific needs rather than following trends.
- ✓Startup phase-based evaluation criteria
- ✓Business model context integration
- ✓Specific need customization
- ✓Copy-to-clipboard functionality
- ✓Example prompts for inspiration
- ✓Focus on non-functional requirements over specific tools
- ✓Future-proof evaluation methodology
Contributing
This tool recognizes that the AI tools landscape evolves too quickly for specific recommendations to remain valuable. Instead, it focuses on helping startups develop solid evaluation frameworks based on their unique non-functional requirements. Feedback and suggestions for improving this methodology are welcome.
WordClock ESP8266
Custom ESP8266-based word clock with personalized family names and welcome messages triggered by key entry.
A personalized ESP8266-based word clock that displays time using words instead of numbers. This custom fork of open-source ESP projects features a custom clock face displaying family names and includes a welcome message system that displays personalized greetings like "HI KEVIN RASSNER" when entering the house with a specific key.
- ✓Word-based time display using LED matrix
- ✓Custom clock face with family names
- ✓Key-triggered welcome message system
- ✓Laser cut metal face plate
- ✓Hand-soldered LED matrix
- ✓Custom woodcrafted frame
- ✓Mobile app control interface
Contributing
Open source project available under MIT license. Full source code, hardware design files, and build instructions are provided in the public GitHub repository. Contributions and feedback are welcome for improving the hardware design and software features.
OD Ontology
Ontology of Organizational Behavior science for analyzing research alignment and organizational problem-solving.
An experimental ontology of Organizational Behavior science that enables analysis of how new articles align with existing research and provides guidance on handling organizational problems based on established sources. This tool explores the strengths and weaknesses of ontologies as a method for AI understanding of scientific concepts.
- ✓Article alignment analysis with existing research
- ✓Organizational problem-solving guidance based on sources
- ✓Ontology-based knowledge representation
Contributing
This was an experimental project to explore ontologies as a method for AI understanding of scientific concepts. The tool is available for research and educational purposes. Contributions to expand the ontology or improve the methodology are welcome.
Expertier1
Two-sided digital marketplace connecting top-tier ex-corporate consultants with companies needing specialized expertise. Try the Consultant App or Company App.
A two-sided digital marketplace with two independent narratives: 'Fast Traction, Minimal Overhead' for consultants and 'Top-Tier Consultants, Instantly Available' for companies. The platform features separate interfaces for consultants and companies, providing a seamless matching experience with built-in profile management, project postings, and contract handling.
- ✓LinkedIn OAuth registration with auto-fill profile and Blue Check verification
- ✓AI-powered matching with 95% match score algorithm for instant consultant recommendations
- ✓Premium tier with monthly credits (€100 value) for LinkedIn reviews, coaching, and group calls
- ✓Zero-Trust Row-Level Security (RLS) on all database tables
- ✓Stripe integration with platform escrow, weekly payouts, and dispute management
- ✓GDPR-compliant with Right to Erasure, audit trails, and 72h breach notification
- ✓Enterprise-ready: SOC 2 Type II, ISO 27001, SAP/Oracle/Salesforce integrations
- ✓Mobile-first consultant app with thumb-friendly critical paths
Contributing
This is a private project in active development. Try the live apps to explore the platform.