I noticed there is a portable tag. There are only 4 questions tagged with it as of today but since portable can mean two very different things in the software world, I think it would be a good idea to clearly define which meaning applies here. So, which of these should portable be used for?
The classic definition, a portable application or method is one that works on multiple systems with different OSs.
The 'modern' definition, a portable application is one that can run from a pendrive or other such media without needing to be installed on the host OS.
Both of these can be relevant to software requests. If I were to ask for a browser I can use on Linux, Windows and OSX, I would tag it with portable. If I were to request a browser that I can install on a pendrive, plug it in to my friend's computer and have my profile all set up, I might tag it in the same way.
So, should portable be split into two tags? Should it keep only one meaning and a new tag created for the other? Should it apply to both?