(Fairly) Simple SSB rig with PTT by KD1JV
This rig was inspired by the "unknown ham from Idaho" minimalist SSB rig.
http://kd1jv.qrpradio.com/ssbrig/SSB.HTM
 

75 Meter Ham DSB Transceiver by KE7HR
With the success of the 75 and 80 meter ham band experiments that I had done in the past, I wanted to have a simple and inexpensive transceiver to bring underground.
http://ke7hr.com/caveradio/dsb75.pdf

3.5MHz 10W SSB Transceiver by JF1OZL
In week day I operate 7MHz CW on my shack. But in these days, on the 7MHz , my signal skips out from Japan and I can't contact any station after 10 o'clock. Therefore I decided to make 3.5MHz SSB and CW rigs.
https://www.emilio.com.mx/jf10zl/3.5mssb.htm

3699 kHz LSB transceiver by OH1TV
This project is real but at the same time a joke. In OH-land the rag-chewing channel on HF is 3699 kHz LSB. Many people meet there every day, sometimes all day. And more are just listening. In fact those hams would not need more radio than this single channel LSB transceiver for 3699.00kHz.
http://www.kolumbus.fi/pekka.ketonen/Transceiver%203699.htm

80m DSB transceiver by PE1JPD
It is a DSB transceiver with an output of 5W. It is build around 8 noval tubes of the EF/EL series using a lot of material from Amroh, a form manufacturer of electronic components in the Netherland.
http://www.pe1jpd.nl/index.php/80m-dsb-transceiver/

80m SSB & CW QRP superhet transceiver by S56AL
The 80m SSB & CW transceiver design is based on an already proven concept used in ATLAS amateur transistorised transceivers from 70's.
http://lea.hamradio.si/~s57nan/ham_radio/ssb_80m/ssb_80m.html

JUMA ERX-1Direct Conversion HF Transceiver with DDS by OH2NLT % OH7SV
JUMA-TRX1 is a direct conversion HF transceiver based on the previous JUMA-RX1, JUMA-TX1, JUMA-KEYER1 projects. It is driven by a stable DDS VFO and has the following features.
http://www.jumaradio.com/juma-trx1/

Nano - The Traveller’s Rig by KANG. K. P. S
ately I had a feeling of necessity of an 80 meter portable rig for use during traveling and camping that proved to be the main impetus behind the development of this little transceiver for portable use.
http://www.hamradio.in/circuits/nano.php

Simple QRP transceiver for 80m SSB by OH1TV
I have many rigs for QRO and QRP, old and new. But still I wanted to build myself a simple SSB rig and feel the homebrewers satisfaction, when on the air with such a rig.
http://www.kolumbus.fi/pekka.ketonen/Transceiver%2080m.htm