recommendations for software for a particular purpose
If you're just looking for a program to accomplish a common task, you can probably find it yourself. See Where can I find Software for Unix/Linux that does X?
If you have more particular requirements, use this tag, plus one or more other tags indicative of the general topic the software is about. If you're looking for a unix equivalent to a Windows program, don't assume your readers will have heard of the Windows program. Avoid subjective requirements like “best”.