SMT Test Socket - TQFP-44 Breakout : ID 1239 : $54.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Schmartboard|ez 0.5mm Pitch, 44 Pin QFP/QFN to DIP adapter (204-0045-01) - Schmartboard, Inc.
DIL44/QFN44-2 ZIF-CS - Universal adapter for devices in QFN 44
QFN-64 | Universal socket board for QFN-64 MCU package
QFN 44 MLF44 WLCSP44 to DIP44 Programming Socket IC550-0444-010-G Pitch 0.5mm IC Size 7X7mm SMT Test Socket - AliExpress
Aprilog QFN ZIF Sockets To SMT Component Site Pads
Amazon.com: QFN44 MLF44 programming Socket Double PCB STM IC Test Socket Pitch 0.5mm Chip Size 7x7 mm Flash Adapter clamshell for programming test with Odd pad matrix QFN IC DIY : Industrial
Amazon.com: QFN44 MLF44 programming Socket Double PCB STM IC Test Socket Pitch 0.4mm Chip Size 6x6 mm Flash Adapter clamshell for programming test with Odd pad matrix QFN IC DIY : Industrial
44 pin TQFP SMD Adapter
Aprilog QFN ZIF Sockets To SMT Component Site Pads
Proto Advantage - QFN-44 to DIP-48 SMT Adapter (0.65 mm pitch, 8.0 x 8.0 mm body)