Free Delphi Libraries: Open Source REST API, Logging, Redis & More
A comprehensive collection of production-ready open source libraries and frameworks for Delphi developers. These tools power thousands of applications worldwide, from small startups to enterprise systems processing millions of requests daily.
All projects are:
- ✅ Apache 2.0 licensed - Free for commercial and personal use
- ✅ Actively maintained - Regular updates and bug fixes
- ✅ Battle-tested - Used in production since 2010
- ✅ Well-documented - Comprehensive guides and examples
- ✅ Community-driven - 6,000+ developers contributing and helping
Whether you’re building RESTful APIs, web applications, logging systems, caching layers, or template engines, you’ll find professional-grade tools here.
Featured Projects
DMVCFramework
The most popular Delphi framework for building RESTful APIs and web applications. REST, JSON-RPC, JWT, WebSocket, SSE, MVCActiveRecord ORM, Repository Pattern with DI. Deploy as standalone server, Apache module, IIS/ISAPI, Windows Service, or Linux daemon.
LoggerPro
Modern, pluggable, and fully asynchronous logging framework for Delphi. 20+ built-in appenders including file, console, database, Redis, ElasticSearch, and syslog.
DelphiRedisClient
The official Redis client for Delphi. Full support for strings, hashes, lists, sets, sorted sets, pub/sub, transactions, Lua scripting, and Redis Cluster.
TemplatePro
Powerful and extensible template engine for Delphi. Jinja/Smarty-inspired syntax with conditionals, loops, template inheritance, macros, and JSON support.
DelphiGuard
RAII pattern implementation for automatic memory management in Delphi. Guard for single objects, ResourceManager for groups. Exception-safe and cross-platform.
Delphi Fake Data Utils
Generate realistic fake data for testing and development. Names, emails, phones, addresses, companies, products, credit cards, IBANs. Multi-locale support.
Delphi Expression Evaluator
Runtime expression evaluator for formulas, business rules, and dynamic calculations. Short-circuit evaluation, LIKE pattern matching, variables, custom functions. Interface-based API with automatic memory management.
Delphi Anomaly Detection
Production-ready anomaly detection with 6 algorithms: Three Sigma, Sliding Window, EMA, Adaptive, Isolation Forest, DBSCAN. Fraud detection, system monitoring, quality control.
WinInspector
Real-time Windows inspection tool. Analyze windows, VCL components, and DLLs under cursor. Cross-process property extraction, Delphi version detection (XE2-13), color picker, global hotkey freeze. Successor to TDWinInfo.
Libraries by Use Case: Complete Your Stack
These libraries work together to build complete applications. Here’s what each one does:
| When You Need | Use This Library | What It Does |
|---|---|---|
| REST API / Web Backend | DMVCFramework | Complete web framework with JWT, WebSocket, JSON-RPC, ORM, SSE Includes LoggerPro and TemplatePro |
| Full Web Applications | DMVCFramework + TemplatePro | Server-side rendered apps with HTMX, or backend for React/Angular/Vue SPAs |
| Real-Time Communication | DMVCFramework (WebSocket/SSE) | Full-duplex WebSocket channels, groups, pub/sub, and Server-Sent Events |
| Database ORM | DMVCFramework (MVCActiveRecord) | Object-relational mapping with CRUD, relationships, RQL queries |
| Clean Architecture / DI | DMVCFramework (Repository Pattern) | IMVCRepository<T> with dependency injection for testable data access |
| Application Logging | LoggerPro | Async logging to files, databases, Redis, ElasticSearch Can be used standalone or with DMVCFramework |
| Caching / Session Store | DelphiRedisClient | Redis client for caching, sessions, pub/sub, queues |
| Dynamic Content Generation | TemplatePro | Template engine for web pages, emails, reports, configs, code generation Can be used standalone or with DMVCFramework |
| Automatic Memory Management | DelphiGuard | RAII pattern to prevent memory leaks |
| Test Data | Delphi Fake Data Utils | Generate realistic test data for development |
| Runtime Formulas / Business Rules | Delphi Expression Evaluator | Parse and evaluate expressions at runtime with short-circuit and LIKE |
| Anomaly Detection / Fraud Detection | Delphi Anomaly Detection | 6 algorithms for real-time monitoring and ML-based fraud detection |
| Windows Debugging / UI Inspection | WinInspector | Real-time window inspection, VCL component analysis, Delphi version detection |
💡 Note: DMVCFramework already includes LoggerPro and TemplatePro, so you get a complete stack out of the box. However, both LoggerPro and TemplatePro can also be used as standalone libraries in any Delphi project.
Example Complete Stack: DMVCFramework (with built-in LoggerPro & TemplatePro) + DelphiRedisClient = Production-ready REST API
Why Open Source Delphi?
Proven in Production
These libraries aren’t academic experiments—they’re battle-tested in real-world applications:
- Banking systems processing millions of euros daily
- Healthcare platforms managing patient data for hospitals
- E-commerce backends handling thousands of concurrent users
- Industrial automation coordinating production lines
- Government services serving millions of citizens
Active Community Support
With 6,000+ developers in the DMVCFramework community alone, you’re never alone:
- Quick answers on GitHub Issues
- Active Facebook group discussions
- Regular updates and security patches
- Premium support available via Patreon
Enterprise-Grade Quality
- 100+ unit tests per project
- Continuous Integration on GitHub Actions
- Semantic versioning for predictable upgrades
- Backward compatibility maintained
- Professional documentation with examples
Frequently Asked Questions
Q: Can I use these libraries in commercial projects? A: Yes! All projects are Apache 2.0 licensed, which allows commercial use without restrictions.
Q: Are these libraries actively maintained? A: Yes! All projects receive regular updates. Check the GitHub badges above for recent commits.
Q: What Delphi versions are supported? A: Most libraries support Delphi XE7 and later, including the latest Delphi 13 Florence.
Q: Is there commercial support available? A: Yes, premium support and consulting are available via Patreon or directly.
Q: How do I report bugs or request features? A: Use GitHub Issues on each project’s repository. Pull requests are welcome!
Support & Community
- Facebook Group: DelphiMVCFramework - Ask questions, share projects
- GitHub Issues: Report bugs and request features on each project’s repository
- Premium Support: Patreon - Priority support and exclusive content
All projects are Apache 2.0 licensed - free for commercial and personal use.
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