Free invoicing software for linux

SureInvoice software is designed primarily for service oriented businesses. SureInvoice is the right tool for the job to track billable hours, non-billable hours and one time or recurring expenses for customer accounts.
Track customer and emplyee or contractor information as well, with a flexible system to track billable rates per customer, project or employee/contractor you can maximize your revenue and avoid double entry of information with the upcoming export support for QuickBooks and OFX.
Customer self-service is a way to offer customers convenient access to their account status, make it easier for them to self-pay and ensure that accounts stay in the black. SureInvoice has all of the features necessary to make customers comfortable in maintaing their own accounts. 24/7 customers can login to review the hours attached to their invoices and print off an invoice to mail in with a check or enter credit card information to pay in real time.
Enhancements:
- This release has Quickbooks integration, a complete new user interface, and many bugfixes.

Strictly Invoices is an application for the small business owner who wants to send out invoices!
Important Note: You may need to make the file executable by changing the properties or running the command:
chmod 755 invoices
Main features:
- Save multiple companies
- Create HTML invoice
- Save Customer Data
- Create Product List
- Print to PDF
- Save Invoices
- Email
- Change any title on the invoice to your needs (Registered Version)

SiteInvoice project helps you manage your customer invoices in a simple and efficient manner.

Customers receive personalized email notices with invoices attached as PDFs, with reminders sent at 30, 45, and 60 days.

Handles multiple currencies and taxes. Never lose track of money you or your company are owed again.

Wiaflos Accounting project is an attempt to create a multi-platform server-client based accounting system.
The goal is to have a central accounting engine which can either run on a dedicated server or on the same PC as the client interface. The accounting engine will provide a full SOAP API for easy writing of GUI/Web interfaces or tieing into inhouse systems. Seeing as the accounting engine is written in Perl and makes use of a database abstraction layer, the engine should run on nearly any operating system and use nearly any database system supported by Perl and the target OS.
We want this package to be of equal use to the one-man-show as a full accounting package running on a single PC aswell as to large multi-national corporate entities with dedicated accounting servers using the package as a fast stable accounting function, solution or full package.
Main features:
Platform independant
- Wiaflos Accountings core and engine is written in Perl. Perl is an interpreted programming language capable of running on many different platforms including Unix/Linux, Mac, Windows, BSD and many more.
Database independent
- Wiaflos Accountings database interface utilizes the Perl DBI module. This module allows Wiaflos Accounting to access multiple database types transparently, allowing you to utilize the database of your choice, be it MySQL, MSSQL, Oracle, Informix, Sybase or ODBC (or basically anything else).
Folding database transactions
- All modules use database transactions to ensure that if an error occurs everything is rolled back to a safe state. When different modules are integrated to provide functionality like invoicing and purchasing, there are sometimes quite a number of transactions involved which both update, insert and query data. The Wiaflos Accounting database engine automatically merges all transactions during a specific operation into one, this ensures a clean rollback should anything go wrong.
SOAP API (WebServices)
- The interface to Wiaflos Accounting is based on SOAP (Simple Object Access Protocol). The SOAP protocol is a critical communication protocol on the Internet due in large part to the fact that it has become native to so many development platforms, this allows Wiaflos Accounting the maximum benefit of integration and interpolation with other software packages. The SOAP API supports communication over HTTP and HTTPS and includes a full user-based access control system, allowing only certain users access to certain API functions.
Persistent sessions
- Not only does Wiaflos Accounting support SOAP, but it supports persistent SOAP sessions. Authentication is only required once, after that a session cookie is handed to the client application which can then be used in future function calls to authenticate.
Enhancements:
- This version includes support for statements and "balance brought forward" when requesting GL entries.
- Some bugfixes and feature enhancements were made.

Jbilling is a recurring billing system, targeting companies that periodically charge their customers for services. It calculates and generates the invoices, handles automatic payment processing with credit cards and notifies the customers about the status of their accounts.
It is web-based, once it is installed in a single server, it can be accessed with a web-browser from any computer in network with the server. If the server is connected to the internet, then the billing system is accessible from any computer connected to the internet.
Enhancements:
- The release notes are in the document release_notes.pdf, which is located in the root directory of the binary distribution (jbilling-1_0_8.zip)

MiniBill is recurring billing software to hopefully create a contender for some of the "Modern Billing" software that is out there.
The goal is to keep it pluggable, small, and affordable. MiniBill can be used as a fulfilment and inventory to a shopping cart system, or for a Web hosting billing solution.
Main features:
- Written in PHP
- Fully Templated Using Smarty Templates
- GPL and Open Source Billing Software
- MySQL Support
- Win32 or Linux
- Billing for web hosting, ISPs, "virtual" stores
- Easy Plugin Support, with many plugins on the way
- Invoice via email
- Anniversary Recurring Billing (via cron)
- Billing gateway through Authorize.Net
- Soon to have paypal IPN Module
- Pre-Billing and Invoicing
- Custom invoice look/feel per order template category
- User Purchase Register
- Unlimited Products/services and Categories
- Simple Inventory Support
- And More!

Quasar Accounting software is a full function, stand-alone business accounting package. You may elect to use Quasar Accounting with the open source GNU General Public License (GPL) which is available free of charge.
Or, you may elect to purchase our commercial license for a nominal fee. To ensure timely access to support you will need to purchase one of our support packages.
With Quasar it is extremely easy to set up remote access to multiple servers from multiple workstations. You can run Quasar on both Windows and/or Linux on the same network. For example, you can maintain a Linux server and access the data from a Windows workstation.
Quasar Retail contains all of the features available in Quasar Accounting plus it contains the Quasar Point-of-Sale driver which allows Quasar Accounting to communicate with the Quasar Point-of-Sale application. Quasar Retail is only available with our commercial license.
In a mission critical environment such as retail you will need to purchase one of our support packages for timely access to support . Resellers and customers who wish a copy of the Quasar Retail source code can obtain it by purchasing annual source code access.
Main features:
international ready
- Quasars new international ready features include the ability to define your monetary symbol, monetary format, date format, time format, number format and percentage format. Any and all text can be translated or changed to suit your specific requirements. In addition Quasar has a standard Canadian format and a standard United States format.
graphical user interface
- Quasar is a new product designed with a graphical interface. It is not an older text based package with a graphical interface add-on. It was designed using Qt which is the same library used for the KDE user interface and other Linux projects. For more information on Qt 3.0 please see the Trolltech web page at http://www.trolltech.com.
fast/easy data entry
- The Quasar main window, icons, menus, lookups, and search functions have all been designed with you, the user, in mind. Screens were kept simple with instant access to advanced functions and superior access to supporting data.
quick error correction
- Existing transactions are easy to find and easy to edit. Quasar has a find transaction screen that allows you to find a transaction very quickly using a variety of selection criteria.
backup and restore
- Backup your company to a backup file and restore it as and when the need arises.
recurring transactions
- Define recurring transactions for recurring journal entries, recurring cheques, recurring customer invoices, recurring vendor invoices and recurring vendor payments.
on-line help
- On-line help is available for every screen. A table of contents provides the ability to move around and view several help screens in succession.
preferences
- Set your style, font and color preferences.
multiple companies
- Create and manage multiple companies within the same application.
import data
- Quasar makes maximum use of XML files for importing. Using XML files you can import data such as the chart of accounts, inventory, customer information, vendor information, opening balances, journal entries, purchase orders and packing slips. new data imports
drill down feature
- From most Quasar information screens you can drill down and view the detail of the actual transactions. This will be limited only by the user security access.
mailing labels
- Print mailing labels for customers, vendors, employees and personal acquaintances. Select labels from one of our supported forms.
work shift control
- Every transaction includes date, time, work station, employee and shift. After a each work shift, you can close the shift, complete cash reconciliations, do tender adjustments and report on the results.