Dudle - Dudle is an online scheduling application, which is free and open source.
Revel - Revel Systems provides an iPad point of sale solution for restaurant and retail establishments.
Gin Gonic - Gin is a HTTP web framework written in Go (Golang). It features a Martini-like API with much better performance -- up to 40 times faster. If you need smashing performance, get yourself some Gin. - ...
Framadate - Make your polls
Beego - Beego Web is official blog and documentation website for beego app web framework