Free Tools Supporting TL-X Language Extensions

For TL-Verilog

TLV-Comp: A fork of Intel's open source release with updates to support TL-Verilog 1a, is available here.
SandPiper: Redwood EDA, LLC's SandPiper™ tool generates SystemVerilog code from TL-Verilog. A free version is available for download.

Vim: A Vim mode is provided as open source by Peter Odding. Hosted on GitHub, and available at vim.org.
Emacs/XEmacs: An open-source TL-Verilog editor mode from Redwood EDA, LLC is hosted on GitLab.
Visual Studio Code: A TL-Verilog editor mode from Dmytro Bogatov is available here.
Atom: A TL-Verilog editor mode from Dmytro Bogatov is available here.
CodeMirror: An open source CodeMirror mode is available, contributed by Ray Ratchup, and incorporated into the CM GitHub repository by Marijn Haverbeke.

Makerchip: Makerchip is a free online IDE from Redwood EDA for open-source TL-Verilog development. Makerchip provides TL-Verilog tutorials, examples, and even courses within the IDE.
eSim: eSim is an open-source environment from FOSSEE for mixed-signal design that integrates several open-source tools. Integration with Makerchip provides digital design using TL-Verilog.
EDA Playground: EDA Playground is a free online IDE from Doulos. It provides compilation, simulation, and verification support using various industry tools. It has its own waveform viewer as well as logic synthesis for FPGAs and includes support for TL-Verilog.