Trackers are tools that assist the runner with checks completed/available, items acquired, and characters acquired among other information. Some trackers require manual interaction, some can automatically track based on the current state of the game.

List of Trackers:

EmoTracker - EmoTracker is a multi-game tracker platform for Windows. The Jets of Time EmoTracker pack supports items and character tracking as well as map/location tracking for multiple game modes. This pack supports autotracking.
The EmoTracker package manager contains many options for Jets of Time. There is also the Beta Tracker Pack which must be installed manually (instructions are on the linked page) but contains several new features.

PopTracker - PopTracker is similar to EmoTracker, though more barebones, and compatible with many of its packs (including the Beta Tracker Pack above). Notably, it works on systems other than Windows, and enables full-fledged map tracking on those platforms. PopTracker can connect to either QUsb2snes or to SNI, both of which can connect to snes9x-rr on Windows or to RetroArch wherever (so long as it has a recent enough version and is running a compatible core, i.e. a bsnes-mercury core). For Linux users, a recommended setup is: PopTracker (which has to be compiled by hand for most users) + SNI (there is a downloadable binary on their site) + RetroArch (for a recent enough version, using a snap may be ideal on dpkg-based systems that often have older versions, such as Ubuntu).

Web Based Autotracker - Hosted on the ctjot.com domain, this tracker is based off of the EmoTracker Items Only variant. Autotracking is supported through QUsb2Snes.

Trackers for older versions of the randomizer:

Web Based tracker by Fleury14 - Web based tracker for the 2.x version of the randomizer. Features item, character, and location tracking by time period.

Web Based tracker by Tekenu - Web based tracker for the 2.x version of the randomizer. Features item, character, and time period tracking.