Standard Crochet Hook:

These can be used for the initial chain if a standard Tunisan hook feels too awkward.

They are also handy for very narrow crochet projects (like creating a 10 stitch swatch), or with additions like a border.

Because loops are collected on the hook, only use standard styles (not ergonomic shapes and sizes) without extra handle grips. Should you use this tool for Tunisian, be careful not to lose your loops off the end.

*Susan Bates brand is similar (affiliate)

Standard Tunisian Hook:

While these mimic standard knitting needles in some ways, note that there is a hook at one end specifically for Tunisian crochet.

These are typically available from 10”-14” in length and have a few notable characteristics: the absence of a thumb grip, a long body with the same diameter for collecting same-size loops, a stopper at one end for keeping loops on the hook as you work.

Much like crochet and knitting tools, these are measured and available in assorted US and millimeter sizes.

*Zuoyou brand is similar (affiliate)

Double Ended Hook: 

This style mimics a standard crochet hook in many ways, except both ends have the same size hook, which is designed for working in short rounds or tubes of Tunisian stitch work.

Because some tubes and rounds of work are quite round and narrow for a straight hook, the idea is to forward and return pass over just a few stitches at a time, instead of working over the entire round at once.

*KnitPal is similar (affiliate)

Circular Hooks:

This style mimics circular knitting needles in many ways, except both ends have the same size hook, which is designed for working in longer rounds or tubes of Tunisian stitch work.

Because some tubes and rounds of work can be quite large, the idea is to have all collected loops to fit comfortably on your Tunisian hook at one time.

*KnitPal is similar (affiliate)

Cable Hook:

This style mimics cable knitting needles in many ways, except the working end has a crochet hook instead of a needle, which is specifically designed for working on longer rows of Tunisian stitch work.

Here, the end of the hook is attached to a length of cable (which can be of various lengths to accommodate different project measurements), then includes a stopper at the end to have all collected loops stay in place.

*Susan Bates is similar (affiliate)