RESEARCH INTEGRITY / AGENT TOOLS Released · MIT
RefExists
Citation verification for researchers and AI agents. RefExists checks scholarly records, matches titles and authors, and explains the evidence behind each result.
THE PRODUCT COLLECTION
Different problems.
One engineering company.
Software developed by DSL4, from focused browser tools to AI-powered platforms. Each project has its own purpose and stage of development.
AI / LANGUAGE LEARNING Released
Versos
Versos turns poetry into a language-learning platform: read real poems, hear them in native voices, reveal translations line by line and return with spaced repetition.
BROWSER / DATA RECOVERY Released · MIT
Mendery
Recover readable content from damaged documents and SQLite files directly in the browser, without uploading the file.
DEVELOPER TOOLS / COMMERCE Released
Papertill
A compact digital-download checkout that brings payments, licence keys and expiring delivery links into one Cloudflare Worker.
AI AGENTS / INTERACTIVE 3D R&D / Beta
BotBalls
A persistent virtual sphere where humans and AI agents participate through an interactive 3D interface and agent tooling.
LEGAL TECH / EVIDENTIARY PIPELINES In development
ThreadCase
A privacy-first evidence pipeline and case-pack compiler: ingest multi-source records, establish cryptographic provenance, and extract chronological event threads without third-party data leakage.
AUTOMATION / LABOUR DATA Released
ConvenioAlert
A monitoring platform for Spanish collective labour agreements, connecting official records, sector classification, salary-table extraction and targeted alerts.
DATA PRODUCTS / FUNDING DISCOVERY Released
Subvenio
Public-grant discovery built around relevant opportunities: official-source ingestion, regional and sector filters, translated information and deadline reminders.
DEVELOPER INFRASTRUCTURE / DATA API Released
FestivosAPI
Spanish national, regional and municipal holiday data through a JSON API, built for payroll, scheduling and applications that need to understand local working days.
DSL4 NEWSROOMSTUDIO BRIEF · 2026
ALL TIMETHIS WEEKCONTENT TYPESORT BY
AI · TECHNOLOGY
AI risk-management frameworks for regulated industries
Executive architecture, governance and a sceptical perspective.
AI DEVELOPMENT
What changes when models meet production systems?
Technical implementation, deployment and the edge cases worth keeping.
DATA & PLATFORMS
Signals from the week in software
Sources, perspectives and the context around the headline.
FILTERS · PERSPECTIVES · SOURCE-AWARE ARTICLES
AI / EDITORIAL SYSTEMS In development
DSL4 Newsroom
Our own editorial platform for source ingestion, AI-assisted enrichment and traceable technology coverage.