Loads of OSS

Whether we use it or not, open source softwares and libraries have become an active part in the industry. You will find at least one open source software in any category you ask for.

Starting with
OS - Linux, Solaris follows it and many more that can be list
Office suites - Open Office, GNOME Office(Abiword,Gnumeric etc), KOffice and more
Browser and mail clients - Firefox, Mozilla suite, Thunderbird, K-Meleon....
Development Environments - Eclipse, Netbeans, Codeblocks, KDevelop, Anjuta, DevCpp...
Web Servers - Apache, Lighttpd...
Editors - Vim, Emacs, PSPad, Notepad++, Pnotepad, JEdit, RJTextEd, Scite, Jext,...
Databases - Firebird, MySQL, Sqlite, PostgreSQL...

C and C++ Libraries
GUI - GTK, FLTK, Fox toolkit, Ultimate++, WxWidgets, IUP....
General Purpose - Boost, PTypes, STLPort...

Java Libraries and softwares
GUI - SWT, Thinlet ...
Document converters and renderers - iText(PDF), POI(MS Office documents)...
Application Servers - Tomcat, Geronimo, JBoss, Jetty....
Web Frameworks - Struts, Tapestry, Cocoon, WebOnSwing, ...
ORMs - Hibernate, iBatis, SimpleORM, jPox, Mr. Persister...

The list goes on and i cant list whole list here and i dont remember everything too.
Today every programmer does use an open source library or software everyday and in few years to come, i think even the others would also go for Open source tools and software which are available for free with at least 90% of the functionalities in commercial products.

It has already begun from the governments of the developing nations to support OSS.
Day by day more and more Linux distros are coming out and they are much more user friendlier than they were. http://distrowatch.com
So what i would like to say is that the OSS era has begun and growing faster than ever. Let us support it.