Gogs is a visual clone of the Github graphic design, functions, menu structure, in short, just about everything from Github. SO sure, it works well and looks good, but uh.. its a total copy. Meanwhile Gitea has forked Gogs, as noted extensively very recently.

Regarding Kallithea, I installed and used it for work. I like Kallithea, although the features and interface are not as well developed as some alternatives discussed here.

Kallithea is far more lightweight to setup and admin that Gitlab, but not as full-featured as Gitea, which I recommend to anyone who asks.

Also, Kallithea does not seem to have its own lightweight issue system. Based on how you look at it, this could be either a positive or a negative...

I've heard that Gitea (the fork) is more actively developed right now so it might be worth investigating that claim before jumping to gogs.

Gogs is also available for some NASes as a package. I have an instance installed on my Asustor NAS for my personal stuff, and it works great.

I just installed gogs. It's very nice. Smooth, simple, familiar. I wonder how they can get away with copying Github so obviously though.