I bought a RTL2832U from ebay downloaded a few apps and now have RF Analyser on my tablet https://play.google.com/store/apps/details?id=com.mantz_it.rfanalyzer
These used to cost a serious amount of money in times gone by.
With the right kit, application – tracking traffic wardens…
My second hack was getting KeePass to work under Linux with plug-ins especially 2FA. Getting your own banking calculator thingy to generate a new code every time you log into a web site securely without out having to resort to using the same password or a post-it note. This seems to be pretty much an underground thing. I’ll post something up about KeePass in the future, but needless to say it allows you to manage your password hell.
My last break through was tracking a way to fix a bug in a lovely log-in in platform called GetGlef – more on this later…