For those starting out in this hobby it's sometimes overwhelming as to which plane they should start out with. So to try and help I've put together this list of planes that can be used as trainers. There are a few things that need to be understood with this list:
1. This list is by no means complete. If there is a trainer that I have missed I am sorry. Let me know what I missed and I'll add it to the list
2. There are no "favorites" on this list. I list these alphabetical order to avoid the appearance of any "favorites".
3. I list only glow powered planes here.
4. I list only "real" planes. There are tons of cheap "toys" out there on the market that IMHO aren't worth a plug nickle for learning to fly.
5. Prices. I have not listed any prices on these planes. Prices change too often for me to try and keep up. Please check the provided links for the current price on the planes.
6. Availability. Even though I provide links to where the plane is available and I am in no way promoting any one vendor over another.

Beginning or "Trainer" Planes

Kits - These are complete kits. You start with a "box of sticks" and will have a complete plane when finished. There is usually a list of items you will have to purchase seperately in order to finish the plane, such as (but not limited to) covering materials, wheels, props, fuel tank, etc. Kits do not include an engine or a radio.

[link= http://shop.balsausa.com/product_p/426.htm]Balsa USA Student Trainer Kit, .40-46 2-stroke/.50-.60 4-stroke,72"[/link]
Goldberg Eagle 2 Trainer Kit, .29-.45,63"
Great Planes PT-20 MKII Trainer Kit, .15-.25,52.75"
Great Planes PT-40 MKII Trainer Kit, .35-.46,60"
Great Planes PT-60 Trainer Kit, .45-.60,71"
http://www.hobby-lobby.com/telemaster40.htm">Hobby Lobby Telemaster 40 Kit
Sig Kadet Senior Trainer Kit, .29-.40,78" - Note: These are older kits for the craftsman-class modeler. The stick frames and many other parts need to be cut by the builder.
Sig Kadet Seniorita Trainer Kit, .15-.25,63" - Note: These are older kits for the craftsman-class modeler. The stick frames and many other parts need to be cut by the builder.
Sig Kadet Mark II Trainer Kit, .25-.40,57.25"
Sig Kadet LT-25 Trainer Kit, .25-.32,63"
Sig Kadet LT-40 Trainer Kit, .30-.40,70"
 

ARF's (Almost Read to Fly) These come 80%-90% complete. Normally all of the major assemblies (i.e. wings halves, fuselage, horizontal and vertical stabilizers, etc...) are complete and covered. They need final assembly, engine, and radio installed for flight. They may or may not contain items such as wheels, propeller, fuel tank, etc... so please check the "required" items list when considering one on this list.

Black Horse Models Excel 2000
Black Horse Models Eagle 40
Black Horse Models Travel Air
Goldberg Eagle 2 ARF, .40-.45,63"
Goldberg Falcon 56 MKII ARF

Hanger 9 Arrow .40 Semi-Sym Trainer ARF
Hanger 9 P-51 Mustang PTS ARF
Hanger 9 Alpha Trainer, ARF
Hanger 9 Solo Sport Trainer ARF,Value Series
Hanger 9 Solo Star Trainer ARF,Value Series
Hanger 9 Alpha .60 Trainer, ARF
Hobbico NexSTAR 46 Trainer ARF .46,68.75"
Hobbico Avistar 40 II MonoKote ARF .40,59"
Hobbico SuperStar 40 MonoKote ARF .35-.46,60"
Hobbico Hobbistar 60 MK.III ARF .61,71"
Kangke Astro H-40 ARF
MECOA K&B Flying Dragon 40 ARF
Midwest Aero Star 40,.32-.45
Pacific Aeromodel Aeroshark .40 ARF
Phoenix Models Sonic 25 High Wing ARF .25-.32,52.3"
Seagull Arising Star 40 ARF Trainer
Sig Giant Kadet Senior ARF Blue .40-.46,80"
Sig Kadet LT-40 ARF .40-.46,70"
Thunder Tiger Tiger Trainer 60 ARF .50-.61,73"
Tower Hobbies TOWER Trainer 40 MKII ARF .40-.46,62"
Tower Hobbies TOWER Trainer 60 MKII ARF .46-.61,69.5"
VMAR Apache III ARF Trainer
VMAR Challenger 40 ARF TrainerVMAR Discovery 40 ARF Trainer
VMAR Stinger 40-52 ARF ECS Sport Trainer (Blue or Red)
VMAR Hornet 40-52 ARF ECS Sport Trainer (Blue or Red)
World Models World Star - 40F - ARF
World Models Super Frontier 40
World Models Super Frontier Senior 46

RTF's( Ready To Fly) These come with everything you need to fly (except the fuel) in the box. They include the engine and radio with the plane. They usually require only a few minor steps, and charging the radio batteries, to have the plane ready for flight.

Hanger 9 F-22 Raptor PTS

This is kind of a "fuzzy" area. For some pilots these planes will be second planes, meaning that they will move on to them after they have soloed on their trainers. While other pilots that have more "natural" talent may be able to use these planes to learn to fly on.

Whichever category you fall into please be aware that these planes are more of handfull to fly than the basic trainers listed above. While these planes my be very docile to fly many of them lack the "self righting" properties of the traditional trainer. Use of these planes as a trainer should be a matter that you take up with your instructor, as he will be the one to best judge your talents and abilities.

Kits

Bruce Thorpe EngineeringVenture 60
Sig Four-Star 40 Kit .30-.40,59.75"
Sig Four-Star 60 Kit 60-.75 in, 71"
Sig Mid Star 40 Kit .30-.40,64.5"
Goldberg Tiger 60 Kit .45-.65,70"]
 

ARF's

Hanger 9 Arrow .40 Semi-Sym Trainer ARF
Hanger 9 P-51 Mustang PTS ARF
Sig Four-Star 40 ARF 40-.53 in. 59.75"
Sig Four-Star 60 ARF Red .60-.75,71"
Great Planes Cherokee GP/EP ARF 60"
Great Planes Escapade Sport GP/EP ARF 52.5"
Great Planes Escapade Sport/Aerobatic GP/EP ARF 68"
Hanger 9 Pulse XT
 

RTF

Hanger 9 F-22 Raptor PTS
Hanger 9 Alpha 40 Trainer, RTF
Hanger 9 Arrow 40 Semi-Symmetrical Trainer RTF
Hanger 9 Alpha 60 Trainer, RTF
Hobbico NexSTAR 46 Select RTF 68.75"
Hobbico Hobbistar 60 Select RTF 71"
Tower Hobbies TOWER Trainer 40 MKII 4-Channel RTF 62"