The most popular HF antenna for hams with trees to use as antenna supports is the dipole. 

• The NJQRP Squirt
  QST April 2001, pp. 40-43
  A reduced-size 80-meter antenna designed for small lots, portable use, and a fine companion for QRP or the Warbler PSK31 Transceiver .
• The Monoband HF Dipole Antenna
  QST April 1993, p. 64
  Construction and installation of a dipole for 80-, 40-, 15-, or 10-meters.
• Antenna Here is a Dipole
  QST June 1991, pp. 23-26
  Step-by-step tutorial on constructing dipoles for any one of the HF bands from 1.8 to 28.4MHz.
• The Bent Dipole 
  QST May 1997, pp. 56-57
  Although not strictly a "project" article, it does answer a common question. "Can I arrange the legs on my dipole to fit my yard?"
• Feeding Dipole Antennas 
  QST July 1991, pp. 22-24
  A continuation of the above article covering open-wire feed line, coaxial feed line and baluns..
• A Modest Multiband Antenna 
  QST July 1994, pp. 68-69
  Construction of the 135 foot, ladder-line fed, multiband dipole. This antenna requires a transmatch (antenna tuner). (See - Transmatch/Antenna Tuner).
• Five Bands, No Tuner 
  QST June 1995, p. 59
  A multiband dipole for 40-, 20-, 17-, 12- and 10-meters. This one is fed with ladder-line, a balun and coax and does not require an antenna tuner.
• The Off-Center-Fed Dipole Revisited: A Broadband, Multiband Antenna
  QST August 1990, pp. 28-34
  A discussion of the Windom and the off-center-fed dipole as multiband antennas.
• Broad-Band 80-Meter Antenna 
  QST December 1980, pp. 36-37. Feedback, QST February 1981, p. 46.
  Construction and theory of operation of the "cage" broadband 80-meter antenna popular in the 1920s.
  Note: ARRLWeb: The "Cage" is Back! W1AW Installs New/Old Antenna.
• A Simple Broadband Dipole For 80 Meters
  QST September 1993 p. 27-30, 76.  A simple broadbanding technique using alternating  50 and 75 ohm coax.
• The Clothesline Antenna 
  QST July 1998, pp. 56-58
  A somewhat camouflaged, ladder-line, balun, coax fed multiband antenna. Requires antenna tuner.
• Multiband Dipoles Compared
  QST November 1996, pp. 73-74
  A comparison of different multi-band dipole techniques.
• The G5RV Multiband Antenna ... Up-to-Date 
  ARRL Antenna Compendium Volume 1, pp. 86-90
• QRP-France with a "Junk Box Shorty Forty" Antenna 
  QST July 2001, pp. 66-68
  A short center-loaded 40-meter dipole for portable QRP
• A Portable Twin-Lead 20-Meter Dipole 
  QST February 2002, p. 36
• K8SYL’s 75 and 10-Meter Dipole 
  QST July 2002, pp. 32-34
• The K4VX Linear-Loaded Dipole for 7 MHz
  QST July 2002, pp. 40-42
  A short but efficient 40-meter dipole

• "This Old Dipole"or Dipole 101 An antenna construction workshop conducted at Marshall N1FN's QTH on Sunday, 8/2/98 (An EXCELLENT step-by-step with color photos on constructing a dipole. - Ed.)
• Design Your Own Dipole and Inverted Vee Antennas

• Curtains for You 
  QST October 1991, pp. 26-30. Feedback, QST December 1991, p.73
  If you have the real estate and the trees, construct this classic Sterba wire curtain for real gain on 10 meters
• The 160-Meter Antenna Dilemma 
  QST November 1990, pp. 30-32
  A tutorial on what is needed to produce a decent signal on 160-meters.
• Broadband Transmitting Wire Antennas for 160 through 10 Meters 
  QST November 1995, pp.22-24
  A traveling-wave antenna offers some attractive qualities for your station: 50 ohm feedpoint at ground level, no tuner required, horizontal and vertical radiation components, no radials, nothing in the air but wire, and flexible size and height requirements.
• The BRD Zapper: A Quick, Cheap and Easy "ZL Special" Antenna 
  QST June 1990, pp. 28-29
  A 15-meter wire antenna that could be used indoors.
• The Scotsman’s Delight  )
  QST June 1963, pp. 24-26
  10-, 15-, or 20-meter two element wire beam.
• The Real "ZL Special"
  ARRL Antenna Book, Ninth Edition, p. 214
  10-, 15-, or 20-meter two element unidirectional wire antenna.
• The "Lowbander's" One-Antenna Farm (586,355 bytes, PDF file)
  QST February 1982, pp. 23-24
  Not enough area for a full-size 160-meter antenna? You may have more room, electrically, than you realize - with plenty of space for 80- and 40-meter antennas, too.
• The NRY: Simple, Effective Wire Antenna for 80 through 10 Meters
  QST March 1993, pp.22-24
  Known as a broadside collinear curtain array, this antenna is simple to build, rakes in DX signals and has gain over a dipole on all the bands it covers!
• Zip-Cord Antennas - Do They Work?
  QST March 1979, pp. 31-32
  Parallel power cord is readily available and is easy to work with. How efficient is it when used at radio frequencies? Well, that depends.
• The "Double-Bazooka" Antenna
  QST July 1968, pp. 38-39
  Broad-band dipole using coaxial construction.
  
• The NVIS--A Low Antenna for Regional Communications
  QST June 2002, pp. 28-30
  A low-to-the-ground wire loop antenna that can provide good regional coverage, day or night.
• The N4GG Array
  QST July 2002, pp. 35-39
  A simple, nearly invisible, multiband wire antenna with reasonable gain, low angle of radiation.
• The Off-Center-Fed Long-Wire
  W1FB's Antenna Notebook, 1987, pp. 36-38
  This is a simple wire multiband antenna that can be fed with either coax or ladder-line and can be made to operate well from 160- to 10-meters with an antenna tuner.
• A High Gain Single Wire Beam by Robert Wilson, AL7KK
  QST July 2009, pp 38-39
  The author now recommends feeding this antenna directly with a 4:1 balun instead of the shunt inductor arrangement suggested in the article.