Took the simple free web service that stayed the same for many years and got it looking new and made it severely weaker without paying in 2015. Now $1/mo or $5 one time (obviously just do the $5 one time unless you just want to use it once).

Not sure if open source? Doubt it. #sleek #APIs #web_tools #cheap #copycopy #freemium #niche_sites #ideas #pub