75 Open Source Replacements for Popular Small Business Software: Page 3

Gateway Security Appliances

43. Endian Firewall Community

Replaces: Check Point Security Gateways, Barracuda Networks Appliances, SonicWall Network Security Appliances, Cyberoam Security Appliances

Endian offers an alternative to expensive security appliances. You can build your own appliance using this free software and any PC, or you can purchase an affordable appliance based on the same open source software from Endian. Operating System: Linux.

Replaces: Check Point Security Gateways, SonicWall Network Security Appliances, Cyberoam Security Appliances

Similar to Endian, Untangle also offers free software or paid hardware appliances. Features include VPN, Web filter, virus blocker, spam blocker, intrusion prevention, spyware blocker, phish blocker and more. Operating System: Windows, Linux.

Graphics/Drawing

45. Dia

Replaces: Visio

Very similar to Visio, Dia makes it easy for small business to create org charts, network diagrams, flowcharts and other simple charts and diagrams. It exports to several file formats, including EPS, SVG, XFIG, WMF and PNG. Operating System: Windows, Linux, OS X.

46. Gimp

Replaces: Photoshop

Photoshop is an excellent tool for photo editing, but the high price puts it out of the reach of many small businesses. Gimp offers similar, professional-quality features, including retouching, distortion correction, painting, alpha channel support, layers, animation and more. Operating System: Windows, Linux.

47. Inkscape

Replaces: Illustrator, CorelDraw

Another program suitable for professional graphic designers, Inkscape offers high-quality vector graphics drawing and editing capabilities. The site also includes a library of free clip art if you need a starting point for your creations. Operating System: Windows, Linux, OS X.

Human Resource Management (HRM)

48. OrangeHRM

Replaces: Halogen software, iCIMS, Ascentis

More than one million people use the open source version of OrangeHRM, "the world’s most popular Open Source Human Resource Management Software." The company also offers an SaaS version called OrangeHRM Live, as well as other paid services. Operating System: Windows, Linux, Unix, OS X.

Invoicing

49. Simple Invoices

Replaces: FreshBooks, Bill.com

Web-based Simple Invoices makes it easy to generate PDF invoices for your clients and reports for internal use. Hosting services are available through third-party providers listed on the site. Operating System: OS Independent.

50. Argentum

Replaces: FreshBooks, Bill.com

Another Web-based option, Argentum tracks clients and time spent on projects as well as generating invoices. The company also offers a hosted service for just $10 per month. Operating System: OS Independent.

51. Siwapp

Replaces: FreshBooks, Bill.com

Designed for simplicity, Siwapp also offers a Web interface for generating PDF invoices. The site offers a helpful demo so you can see it in action. Operating System: OS Independent.