A Resistive SWR Bridge by G3YCC
The bridge shown is popular with QRPers. There is no setting up to do and the circuit need not be laid out symetrically as with other designs.
http://www.zerobeat.net/g3ycc/res_swr.htm
 

A Simple LED SWR Bridge by GØWQR
This simple SWR bridge uses a superbright LED instead of a meter and was described by G0WQR in Sprat 93. He found the LED is fully illuminated with less than 1 watt output and extinguishes when minimum VSWR is achieved.
http://www.zerobeat.net/g3ycc/ledswr.htm

A PIC16F876 based, automatic 1.8 – 60 MHz SWR/WATTmeter
This project describes a digital, totally automatic, version of the classic SWR meter, capable of displaying both the SWR and P.E.P. power values, with a bar graph on the second line tracking the instantaneous power.
http://www.ik3oil.it/_private/Articolo_SWR_eng.pdf

Digital Wattmeter by OZ2CPU
This instrument can be used and calibrated from 1 kHz and up to 500 MHz. It is possible to measure power relative all the way up to 900Mhz. A software routine can calibrate the 0dBm point at 5 different frequencies to make this instrument accurate within 0.5dBm !!
http://www.webx.dk/oz2cpu/radios/miliwatt.htm

L.F. VSWR Meter by GØMRF
The circuit for the VSWR Meter is by no means original, but it is probably one of the most useful accessories that I've made for my LF station. Constructed from parts collected at Radio Rallies, the total cost was £8 ($­­12).
http://www.g0mrf.com/lfswr.htm

Linear scale analog watt meter by KD1JV
Looking though an old National Semiconductor Linear applications book, I found a reasonably simple circuit which will square an input voltage and convert it to a current suitable for driving an analog meter. I put one together and it works great.
http://kd1jv.qrpradio.com/lspwmtr/linear_analog_SWR_meter.HTM

QRP Power meter door PE12KQP
Dit is een eenvouduge relatieve powermeter tot maximaal 1 Watt.
De weerstanden en diode en condensator op het chassiedeel solderen.
http://pe1kqp.radiozendamateur.com/index.php?page=qrp-power-meter

QRP POWER METER and DUMMY LOAD by AA5TB
The above schematic is of my QRP power meter and dummy (50 Ohm) load combination. The 50 Ohm load consist of resistors R2 through R5. The four 200 Ohm resistors in parallel combine to make 50 Ohms.
http://www.aa5tb.com/qrpmeter.html

QRP SWR Meter by JF1OZL
A lot of troubles occur, when I make expedition on the local hill. For example miss connection between transceiver and the antenna occurs sometimes. In order to avoid these troubles, I will recommend you to use the SWR-meter in every time of your QSO.
http://www.intio.or.jp/jf10zl/swrk.htm

Return Loss Bridge 1,8 MHz...1300 MHz by HA8ET
http://www.pollak.sulinet.hu/elektro/hidak/hidak.htm
 
 

SWR meter voor de hogere frequenties door PE1KQP
Veel swr meters die voor de 27 mc verkocht worden zijn met een kleine aanpassing op 2 meter goed te gebruiken.
Om de bruikbaarheid te testen doe je de omkeerproef.
http://pe1kqp.radiozendamateur.com/index.php?page=swr-meter

The Resistive SWR Bridge by G3ROO
The resistive SWR bridge is highly recommended for both beginners and experienced constructors.
http://www.interalia.plus.com/q_tech15.htm
 

Een zelfbouw Wifi (V)SWR Meter door PE2ER
Bij het bouwen van antennes voor de Wifi band (zoals de 8dBi omni), ontstaat al snel de behoefte om deze antennes op een eenvoudig manier te kunnen testen. Een staande golf (SWR) meter voor de 2,4GHz band is echter niet eenvoudig te krijgen.
http://pe2er.nl/wifiswr/NLindex.htm