lock_and_cache_manager
Most caching libraries don't do locking, meaning that >1 process can be calculating a cached value at the same time. Since you presumably cache things because they cost CPU, database reads, or money, doesn't it make sense to lock while caching?
lockenv
lockenv is a system to have centralized all your environment variables, to be able to have different projects and an easy and simple way to switch between them, inspired on vercel env CLI
node-locksmith
node-locksmith ensures that only a single instance of an application can run at once. It uses a lock file to maintain a system-level mutex.