forums topic
vanilla
Vanilla is a powerfully simple discussion forum you can easily customize to make as unique as your community.
laravel.io
The Laravel.io Community Portal.
thredded
The best Rails forums engine ever.
maple-bbs
a forums system based on flask
Kotlin-CN
【已下线】https://discuss.kotliner.cn 的第一个实验版本，尝试使用Kotlin编写构建的 Kotlin China 论坛，etcd+自研tpc协议RPC
4cat
The 4CAT Capture and Analysis Toolkit provides modular data capture & analysis for a variety of social media platforms.
crowdwise
Chrome extension that adds to your browsing experience by showing you relevant discussions about your current web page from Hacker News and Reddit.
byceps
BYCEPS is a self-hosted web platform to run LAN parties. Multiple brands, multiple sites, advanced ticketing, seating, native discussion board and shop, intranet mode, etc.