The GPLed linux device driver called Ralink RT2870 USB ABGN WLAN should be supported since linux kernel 2.4/2.6 serie but isn't included in Trisquel's package archives.
However, Ralink's firmware drivers can be found at Ralink Support for Linux kernel [RT2870USB(RT2870/RT2770 v2.4.0.1 (2010-07-09)]
PS. Reply from Trisquel from 2011-12-07:
> From LICENSE ralink-firmware.txt
> Redistribution. Redistribution and use in binary form, without > modification, are permitted provided that the following conditions are > met:
> The driver is non free, so we won't add it to trisquel.
3G cards | 34 |
Acquisition cards | 34 |
Bluetooth | 56 |
Ethernet cards | 171 |
Fingerprint readers | 11 |
Host Controllers | 170 |
Modems | 18 |
Notebooks | 791 |
Printers | 125 |
RAID adapters | 20 |
Scanners | 24 |
SD card readers | 57 |
Sound cards | 142 |
Video cards | 342 |
Webcams | 132 |
Wifi cards | 234 |
TOTAL | 2361 |