Finance & Accounting
Mint (USA & Canada)

An entirely automatic spending tracker and budgeting tool, Mint is great for people trying to build financial responsibility who have trouble keeping track of the specifics of their finances.
PayPal

When it comes to sending and receiving money online, PayPal is a major player. A huge (and growing) number of online retailers and service providers now accept payments via PayPal. And you can even send international transfers for a pretty small fee.
Money Saving Expert

Money Saving Expert is an absolutely huge resource covering everything you could possible need to save money. Whether you’re trying to find coupons, or looking for credit card deals you’ll find the advice you need. The site also has an incredibly active forum if you have more specific questions to ask.
Google Finance

Rather than relying on just one financial news site, Google brings together stories from the many of the best. Whether that’s Reuters, Bloomberg, or the Financial Times, the main headlines will show up in Google Finance. You’ll also have easy access to all the market and portfolio data you need.
Expensify

Need to track your spending to find out where your money is going? Expensify lets you track your spending in a number of different ways and generates expense reports and analyses for you to look over later.
TaxAct (US only)

Great, easy to use software for filing your taxes at the end of the fiscal year. Free for federal taxes.