If you know and have typed the first few letters of a word but not enough for the built in spell checker just hit F5 or option esc. You will get a list of options :) Works in most cocoa programs.
EazyDraw is a great vector drawing program for those of us that love playing around with graphics but can't draw a straight line. ;)
I've used it for drawing out floor plans to making up logos and birthday cards.
http://www.eazydraw.com/
US$95 but there is a US$20 9 month license and free...
I have found this to be a excellent piece of software to keep track of my mutli account budget. It easily downloads the files from my banks too. Scheduled Transactions, Transfers, sub categories, reports etc.
US$25.
http://www.iggsoftware.com/ibank/