So long as you have remote access enabled in the sharing section of your system preferences, you should be able to ssh into your mac.
As for the windows ssh clients... there are tons of them... Take a look
www.tucows.com and find one that looks appealing to you...
Personally, I use a program called Putty. Its pretty small, has any bell and whistle that most folks would need and its pretty fast. All in all I would recommend it.
SSH is on port 22
Telnet is on port 23
Good luck