Intuit QuickBooks!

GnuCash is personal and small-business financial-accounting software, freely licensed under the GNU GPL and available for GNU/Linux, BSD, Solaris, Mac OS X and Microsoft Windows.

HomeBank is a free software. Use it to manage your personal accounts. It is designed to easy to use. Analyse your finances in detail using powerful filtering tools and graphs.

Send, track and collect payments quickly. Great for teams, freelancers and service providers. FreshBooks is an easy cloud accounting app for small businesses and freelancers, specifically designed to save you time billing clients. Create professional invoices, capture expenses with ease and effortlessly track time on projects; it’s all here, plus you’ll be ready for tax time.

ZipBooks allows contractors and small businesses to send quotes and invoices to potential customers or paying clients. Create a project with ZipBooks and track the time, products, and expenses of your work. Once you are ready to send an invoice to a client, ZipBooks automatically detects unbilled activity and allows you to include any or all of the billing details. You can customize the rate of each of your team members, whether to include an attached PDF, and even add your own logo to invoices. Because we make money if you use our credit card payment partners, ZipBooks is 100% free, forever. We will never spam you, show you ads, sell your information, or watermark your invoices. »

Tryton is a three-tiers high-level general purpose application platform under the license GPL-3 written in Python and using PostgreSQL as database engine.

The suite of applications Stoq is an innovative set of business management applications available as free and open source software.

FrontAccounting is a simple, but powerful, system for the entire ERP chain and covers:

webERP is a complete web based accounting/ERP system that requires only a web-browser and pdf reader to use. It has a wide range of features suitable for many businesses particularly distributed businesses in wholesale and distribution. It is developed as an open-source application and is available as a free download to use. The feature set is continually expanding as new businesses and developers adopt it.There are on average 5,000 downloads per month.

The easiest way to track and forecast your wealth - using a calendar. Put all of your income and expenses on a calendar so its easy to see your daily balances, when bills are coming out, get reminders and see where your money is going.