Sisolo is a simple solar logger, meant to run on small embedded devices, like routers. Currently it targets OpenWrt, uses Yasdi to interface with SMA inverters and Curl to store logs on an ftpserver.
Pace Check is a utility that searches through system logs and finds cases where someone has tried to gain access to your server (non-legit), then it saves them to a log, mails them to you, or sends them to stdout. It supports http, ftp, and others.