Flex or FLEX may refer to:

Science and technology


  • Apache Flex, formerly Adobe Flex, technologies for developing rich internet applications
  • Flex (language), developed by Alan Kay
  • Flex lexical analyser, a free software alternative to lex
  • Flex machine, a computer developed by RSRE in the 1980s
  • FLEX (operating system), a single-tasking operating system for the Motorola 6800
  • FlexOS, a modular real-time multi-user multi-tasking operating system developed by Digital Research
  • FLEX (protocol), a communication protocol for pagers
  • FLEX (SIL FieldWorks Language Explorer), an open source application for linguists developed by SIL International
  • Flex, a family of automatic test equipment produced by Teradyne




Other uses