The webparts package defines a mostly abstract standard library primarily for building server-based web systems and applications that are:
mqueue implementation support pausing/blocking a queue (that's in the implementation, though), maybe making a lookup table for queues so that it automatically validates if it exists/is valid
document/nosql database? (there's already redis)
log: webparts-logrus, an implementation of the log interface with logrus (https://git.sr.ht/~mna/webparts-logrus)
flag: webparts-flag, an implementation of the flag interface with standard library's flag and envconfig (https://git.sr.ht/~mna/webparts-flag)
metric: webparts-expvar, an implementation of the metric interface with standard library's expvar (https://git.sr.ht/~mna/webparts-expvar)
http/httpssn: webparts-sessions, an implementation of the HTTP sessions interface with gorilla's sessions (https://git.sr.ht/~mna/webparts-sessions)
The BSD 3-Clause license.