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stlink is an open source toolset to program and debug STM32 devices and boards manufactured by STMicroelectronics. It supports several so-called STLINK programmer boards (and clones thereof) which use a microcontroller chip to translate commands from USB to JTAG/SWD. There are four generations available on the market which are all supported by this toolset.
The GoodFET is an open source JTAGprogrammer based upon the Texas Instruments Flash Emulation Tool. While retaining partial compatibility with the TI design, the eventual goal of this project is standalone firmware with no proprietary components.
Software to support the JTAG bus (IEEE 1149.1). Primary purpose is for a JTAGprogrammer/debugger using FPGA's to provide ability to test and program JTAG devices.