FTX has several uses including:
- An XML transformation language
- Fault-Tolerant UNIX, a Stratus Technologies operating system
- FTX (Field Training eXercise), a military term
- FTX, a term for a genderqueer person who was born genetically female who is transitioning, not to male, but to something else
- FTX, (Field Training Exercise) Structured Railroad Operational testing of an employee's knowledge and skill required according to federal regulation 49 CFR 217.9
- Ftx gene, a long non-coding RNA gene.