If you want to know what software is available on Linux that meets the needs of your software on Windows, then check out The Table of Equivalents/Replacements/Analogs.
I have my own list of software that works on Windows and Linux on my Favorite Software Page.
If you do a little research, you will find that almost all Linux programs have been ported to Windows and many other Operating Systems, and they look and function the same way with only minor differences. Firefox, Thunderbird, and Open Office are three very well-known examples of this. One way to prepare for future explorations into Linux, is to use the Windows versions of software to get your job done. Almost all are free, and work just as well as the Microsoft equivalents, and often better, and usually more secure.