| Babel | Internationalization and localization utilities | BSD License |
| Chardet | Character encoding detection for file imports | LGPL |
| Cryptography | Cryptographic functions for security | Apache 2.0/BSD |
| Dateutil | Date and time manipulation utilities | Apache 2.0 |
| Decorator | Decorator utilities for Python functions | BSD License |
| Docutils | processing and generation | BSD License |
| Feedparser | RSS and Atom feed parsing | BSD License |
| Gevent | Asynchronous networking framework | MIT |
| Greenlet | Lightweight coroutines for concurrency | MIT |
| Idna | Internationalized domain name handling | BSD License |
| Jinja2 | Templating engine for reports and views | BSD License |
| LibSass | CSS preprocessor for styling | MIT |
| Lxml | XML and HTML processing for reports | BSD License |
| MarkupSafe | Secure HTML/XML string handling | BSD License |
| Num2words | Number to words conversion for invoices | LGPL |
| Ofxparse | OFX financial file format parsing | MIT |
| Passlib | Password hashing and verification | BSD License |
| Pillow | Image processing for attachments and products | HPND |
| Polib | PO file parsing for translations | MIT |
| Psutil | System monitoring and utilities | BSD License |
| Psycopg2 | PostgreSQL database adapter | LGPL |
| Pydot | Graph visualization for workflows | MIT |
| Pyparsing | General parsing framework | MIT |
| PyPDF2 | PDF file manipulation and merging | BSD License |
| Pyserial | Serial port communication for IoT | BSD License |
| Python-stdnum | Standard number formats validation | LGPL |
| Pytz | Timezone handling and conversion | MIT |
| Pyusb | USB device communication | BSD License |
| Qrcode | QR code generation for products | BSD License |
| Reportlab | PDF report generation | BSD License |
| Requests | HTTP client for API integrations | Apache 2.0 |
| Tzlocal | Local timezone detection | MIT |
| Vobject | vCard and iCalendar format handling | Apache 2.0 |
| Werkzeug | WSGI utilities for web framework | BSD License |
| Xlrd | Excel file reading for data imports | BSD License |
| Xlwt | Excel file writing for exports | LGPL |
| Xlsxwriter | Excel XLSX file writing | BSD License |