If you are looking for free or professional Vedic astrology tools, the following programs are widely used and available for download:

Standard features to look for in a "proper" Jyotish tool include: Shri Jyoti Star 10 - Free download and install on Windows

Considered the "gold-standard" for accuracy, this Windows software provides comprehensive tools for Parashara, Jaimini, and KP systems. A free version for basic charts is available on the Microsoft Store . Core Features of Jyotish Software