View a calendar with astrological transits listed as events with descriptions of the effects.  All Free.  You can view the data in Google Calendar format from any computer or browser.  You can also subscribe to a daily agenda of this calendar through your Google account.   The data for this calendar is calculated with Solar Fire 7 on Windows XP by Astrologer and Programmer Nancy Schorr. 

Smart Almanac is an astrological online application which computes favorable time frames for actions you may have to perform in your daily life, this is the perfect astrological assistant to organize your schedule hourly.
Quickly get a 440 pages analysis navigable PDF report that will tell you hourly when to act in your favor, when the planets do support your action, given your natal chart, and your current location on earth.

Astrology calculated in Excel
complex routines not available elsewhere, also includes The Astral Notebook, in fully editable form.  The software calculates and exports short customer files in a crude but effective form.

Software helps to find Best Muhurat based on the event. The software is based on the book "K.P. Muhurat - A Novel Technique in K.P." and uses KP Astrology principles. This software guides the user, step-by-step through the process of calculating the most astrologically auspicious time for a particular occasion or commencement of an activity on the basis of a good longevity and the required significators of the concerned cuspal sublords and running Dasa-Bhukti-Antara-Sookshma lords.
 
Most common events are:
 

Urania Lite offers natal, progressed, directed and transit astrology charts, multiple composite up to 25 natal charts, transit list, widest selection of house systems and exact house charts in many systems, widest range of objects that can be placed easily on wheel and in aspect grid, Jonas cycle dates, astroclocks - standard, dynamic composite, clock as comparison with natal, combined ecliptic/house chart, import form ZET.

Urania offers broad range of astrological techniques, among them are synastry concentric astrology charts up to 5 wheels, multiple composite up to 25 natal charts, broad range of transit and progress lists, comparison progressed lists, graphical bar transit lists 'in-orb period', astrocartography and cyclocartography with planets on asc and/or on horizon, aspect figures predefined figure set and advanced filter 'all figures', widest selection of house systems and exact house charts in many systems, widest range of objects that can

Primary Direction Explorer (aka PDExplorer or simply PDE) is a freeware astroprocessor designed especially for exploring astrological Primary Directions. Along with regular set of features any astroprocessor has to implement, PDExplorer considers celestial body's oblique and in mundo longitude. These parameters are of some interest in primary direction analysis, though they are not easy things to calculate. Due to calculation difficulties many astrologers do not use Primary Directions in their practice.

Maitreya is a free software for Vedic and western astrology.

The software supports

• Many features for the daily work of Vedic and western astrologers.
• A large number of calculation options that make the program a stable basis for research purposes.
• High precision calculation.
• Several platforms including Windows, Linux and UNIX.

What Watch is a powerful tool that covers many areas and techniques of astrology. Its purpose is to get quick access to relevant information and displaying it in a concise and no-nonsense way: Keep it simple while providing all that is necessary. What Watch assumes that you're already familiar with some basics of astrology, and has an extensive tutorial explaining how to use the astrological techniques implemented here. My view on the foundations of astrology is also explained on this website.

RIYAL calculates astronomical positions and a wide variety of astrological measurements for the following bodies:

- Sun, Moon, and planets.
- named centaurs and transneptunians
- unnamed centaurs observed at 2 or more oppositions
- damoclians and oortoids with accurately determined orbits
- long-range scattered-disk objects observed at 2 or more oppositions
- unnamed transneptunians brighter than absolute magnitude 4.5
- additional list of asteroids selected by the user
- solar system barycenter