This introduction to text manipulation on UNIX platforms provides an overview of some common commands widely available and installed standard on most UNIX-based releases. Many times these standard utilities are ignored in favor of more modern text-processors such as Perl, Python, or Ruby, which are not always installed on a system. An introductory review of these tools helps practitioners who are learning UNIX or Linux or those who may be looking to renew forgotten knowledge.

of note, how to append bash history as it is written.

Homebrew is the easiest and most flexible way to install the UNIX tools Apple didn't include with OS X.

Xpra gives you "persistent remote applications" for X. That is, unlike normal X applications, applications run with xpra are "persistent" -- you can run them remotely, and they don't die if your connection does. You can detach them, and reattach them later -- even from another computer -- with no loss of state. And unlike VNC or RDP, xpra is for remote applications, not remote desktops -- individual applications show up as individual windows on your screen, managed by your window manager. They're not trapped in a box.

Fast http server in python for fast clients on high bandwidth low latency networks

elinks htop and other very usefull terminal apps ... on linux

A fast, powerful backup system built upon Git and efficient, compact tools written in OCaml (faster than the C counterpart with 1/5th of the code :)