When working on various projects, if a library can be extracted out that might be of general interest to others, I'll publish a gem. Here's a sampling.
- Unit Validation
- A nice gem called ruby-units can do measurement conversion between units; applying it in a recent rails project to validate a model was a natural fit, so I extracted the validation code to a gem for easy reuse.
- Published on google code, html5shiv adds html5 elements to IE. I simply wrapped it up into a gem to make it easier to install.