Last week Kevin posted a great article on how to input nonstandard characters on your computer. Today I just found out about a piece of software that can insert characters for you, and tell you how to type them yourself. It is like Adobe's Glyph panel on steroids.
The product is called popcharx and retails for about $45. I personally have not used it, but it looks promising.
http://www.ergonis.com/products/popcharx/
*I just wanted to thank the people commenting on this post that ergois actually has a windows version of this software too called popcharwin. Thanks for letting me know!
http://www.ergonis.com/products/popcharwin/