Organization and diligent accounting are two of the most important factors for handling a business successfully. Whether you're a freelancer or a small business owner, using the ideal invoicing software or application will help you make use of your time, money, and effort more effectively and efficiently.

Here are the top 10 invoicing software, programs, and applications in no particular order.

SimplifyThis - It's a web-based application that even novices won't have a hard time using. It lets you send invoices by email or program it automatically create and send invoices to certain clients, accepts online payments, and track daily expenses and receipts. The free account will allow you to send 3 invoices per month. Paid accounts have maximum monthly charges of $29, allowing you to send up to 3,000 invoices monthly. Individuals can make use of their 30-day free trial offer to explore their paid packages.

Quickbooks- One of the most popular invoicing programs available today, QuickBooks is the answer to business owners' needs for advanced bookkeeping and invoicing options. Not only that but unlike other accounting software tools, Quickbooks gives you a wide degree of control over your inventory. In fact, manual inventory becomes completely unnecessary once you've got your Quickbooks up and running from your computer. Basic package costs $799.95 while Quickbooks Pro is priced at $1,049.95

Side Job Track - This program is a combination of project management and accounting tools. It is best suited to freelancers or professionals and individuals who offer certain services on the side. It works better for individual users involved with multiple projects than for team members working on a single project.

Side Job Track lets you compute your sales invoices, gather client data, create annual financial reports, and organize your projects with its calendar feature. And the best thing about Side Job Track is that it's completely free!

Billable - This program is only for Mac users and sold at $35 with a free 30-day trial. It lets you compute rates for time-based services with programmable time spans and quantity-based services for single or multiple items, view time progress of a particular service, create invoices according to your preferences and in PDF format, add special taxes to invoices for international clients, and update your software with the latest releases from the official website.

The most recent version from Billable offers new features like creating service descriptions, integrating operations through AppleScript, new visual calendar popups, and easier control over invoice creation and sending.

Invoice Place - This basic accounting tool offers free and paid accounts. Free accounts let you entertain a maximum of three customers while its most advanced package, with a monthly fee of just $32, lets you handle as much as five hundred clients. Invoice Place allows you to customize your invoices to accommodate discounts, partial payments, taxable and non-taxable prices, different currencies as well as postage and handling. Invoice Place is best for working professionals and small business owners.

Less Accounting - If what you're really after is an accounting tool that will make computing your earnings and expenses the easiest way possible then Less Accounting may just be what you need.

With Less Accounting, you can collect data about your clients, employees (freelance or permanent) and suppliers and integrate them with other functions of the program. You can also track paid and unpaid fees, manage projects and assign them to individuals listed in your contact records, send project proposals, track mileage for your business' vehicle, create simple financial reports to know if you're earning for the year, and of course create and send invoices.

Less Accounting offers a free account but limits sent invoices, mileage logs, deposits, expenses, and proposals to just five per month. Paid accounts are priced at only $19.95 monthly and allow you unlimited use of their features. You can also take advantage of their 30-day free monthly trial.

Billing Orchard - It offers automated scheduled invoicing and recurring billing, computation for time-based services, Authorize.net and PayPal integration, and client mailing list. There's a free 15-day trial offer for its paid account. Monthly fees are only $14.95 but you'll have to pay extra for special features like help desk and support ticketing system.

Cashboard - It's a simple software-based solution to your invoicing needs. Plans range from free to monthly fees reaching up to $90. Free accounts are limited to two active projects, clients, staffers, but with unlimited invoicing.

Freshbooks - Easily as popular as Quickbooks, this software tool helps you create, manage, and send invoices in a jiffy, accept payments from various handlers, create financial reports, and track work hours. Free accounts will allow you to handle three clients, 1 other person accessing your account, and with unlimited invoicing. It also offers a 30-day money-back guarantee trial period.

Blinksale - Manage your business' needs in a blink with this software tool. A free account will let you handle unlimited number of clients but only three invoices per month. A 30-day trial is also offered. Blinksale provides users with easy customization and management of invoices, integration with MS Excel, PayPal, and other applications, but its current version doesn't offer print options.

Which one do you use?