Bootchart
Bootchart is a tool for performance analysis and visualization of the GNU/Linux boot process.
11 Alternatives To Bootchart

BootVis
Microsoft tool to provide faster XP boot and resume times….
Chaperone Process Manager
Chaperone is a lightweight alternative to process environment managers like systemd or upstart.
Supervisor
Supervisor is a client/server system that allows its users to monitor and control a number of…
Upstart
Upstart is an event-based replacement for the /sbin/init daemon which handles starting of tasks and…

finit
Finit is a simple alternative to SysV init and systemd, reverse engineered from the EeePC fastinit ten years ago by Claudio Matsuoka — “gaps filled with frog DNA …” Finit supports runlevels, process monitoring, and starting services on demand using …
nosh
The nosh package is a suite of system-level utilities for initializing and running a BSD or Linux…

procd
procd is a process and system init service for OpenWRT.
runit
runit is a cross-platform Unix init scheme with service supervision, a replacement for sysvinit…
systemd
systemd is a replacement for the init daemon for Linux (either System V or BSD-style).
sysvinit
Savannah is a central point for development, distribution and maintenance of free software, both GNU and non-GNU.