Pierre
? I am also an HL2 user. Fldigi is included in sBITX releases. The screen is a standard LINUX screen for the OS flavor used, just small. You can add apps, although you may have to compile them yourself. JJs Toolbox "Screen Resizer" (see wiki "how to") lets you use a larger virtual screen that third party apps like WSJT-X require.
Be aware that the sBITX software is far less developed than Thetis and SDR Console, which have had many years of concentrated development.
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??? Bob? KD8CGH
Bob Benedict, KD8CGH