The first entry FreeRTOS shows MIT as license, but says it's distributed as GPL in the description. I don't know where they got the GPL part from: it's not mentioned anywhere at https://www.freertos.org/a00114.html
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FreeRTOS used to be dual-licensed GPL (with an LGPL-esque linking exception) and commercial. Amazon acquired the copyright in 2017 and relicensed FreeRTOS under the MIT license.
From https://aws.amazon.com/freertos/pricing/ :
The Amazon FreeRTOS operating system and software libraries are released under the MIT open source license, a permissive license with limited restrictions on reuse.