Open Source JavaScript Invoice Software for Linux

Frappe Books is a free and open source desktop book-keeping software that's simple and well-designed to be used by small businesses and freelancers. It's got everything you need from a small business accounting tool: invoices, billing, payments, reporting and more. It's made to work offline using a local SQLite file as the database, so you don't have to be dependent on a Cloud service provider. Frappe Books features a clean and modern, web-friendly UI, beautiful invoice templates, standard financial reports and other great features. It's inherently portable and secure, as your data is never uploaded into the Cloud.

Entirely web-based. It is coded in efficient PHP to present a very low overhead on hardware presenting screens fast & capable of working over low bandwidth connections. Now with HTML 5 & javascript form validation & table sorting. Mature codebase with a wealth of features: - Multi-currency - Multi-inventory location - Serial and Lot tracking inventory - Full double entry general ledger - Weighted Average or Standard Costing - Manufacturing works orders - Material Requirements Planning - Shipment costing - Contract/job costing - Fixed asset management - Sales Analysis - Expense claims - Can be integrated with an number of 3rd party wikis Particularly suited to wholesale, distribution, manufacturing and now also as the hub for multi-branch retail businesses (with an external deskop POS add-on). Translations into over 20 Languages. Easily modifiable code, written using simple and accessible PHP for ease of maintenance and understanding. Reporting direct to UTF-8 PDF

Consultant Vendor Management software is an invoice based system written with consulting companies in mind to enter timesheets, generate invoices, track payments, commissions, payroll and expenses from one single location.

Keeps track of times entry and expenses reports of employees and contractors by projects and accounts, automatically generates invoices with details. You can print weekly time cards and expense reports by employee, project, and account. It allows you to review and approve times & expenses before generating invoices. This application is ideal for who bills their clients by time and material basis, such as IT consultants, Lawyers, CPAs, Government Contractors etc. Full featured demo site: http://tems.sourceforge.net Play with it from your browser to find out if it will fulfill your requirements, before downloading it.