I found these online and added them to my gitconfig at one point... I can't take credit for them. Integrating fzf with git makes working with branches even better (with fuzzy matches for checking out as well as deleting branches)...
I was working for a team that didn't have any mobile developers so we had outsourced an iOS app to connect with our SOAP based API. A few years later, our mobile app was woefully out of date, so I thought I'd take upon myself to 1) learn Swift and 2) convert the library over. Unfortunately, it was a nightmare to work with SOAP (and XML) in Objective C and Swift, so I played with an abstraction to help with parsing XML. The end result became an early version of SWXMLHash [1].
The irony is that I never finished the rewrite, but the library was helpful to other Swift developers so I've been maintaining it since.