macOS, Linux, Windows - what you like!
For me (maxOS):
1. iCloud Login
2. 1Password Setup
3. Fastmail Login
4. Xcode + Developer Tools
5. Homebrew + Ansible
4. Dotfiles (includes Homebrew cli tools) [1]
5. Apps via AppStore
6. Apps via Homebrew
Most important Apps:
- Atom
- Slack
- iTerm2
- Vim
- Xcode
[1] https://github.com/bahlo/dotfiles
Ros (Robotics stack)
OpenCV (from source)
Caffe
PointCloud
Google benchmark and Google test
Linux perf tools (I am one crazy measuring geek)
GCC (latest version from source)
LLVM (Same ^^^)
and one that I don't use that much is radare2 since I am reverse engineering hobbyist.