Bardic skills include the ability to play instruments or sing, and to speak eloquently (see the roleplaying page for an explanation of that!). From these basic abilities come skills such as the power to inspire others to great rage, satirize, praise, persuade one person to hate another, put them to sleep, or even entrance them with spellbinding performance until they cannot help but dance to your music.
Medical skills include the ability to administer first aid, operate upon the badly wounded, use a variety of drugs to cause a range of effects (and side effects) on patients, dress wounds, and of course, give instant anatomical assessments of anyone you see.
Ranger skills range from basic woodscraft, permitting you to set up decent campfires and other basic things such as the proper method of carving and dressing a dead deer, to hunting and tracking skills, archery, and skills for animal training and lore, and even dowsing. These skills are not all available at this time.
Tradesman skills encompass a wide range of craftsman and merchant skills, including haggling, repairing and mending, forging and other forms of manufacture--plus the little comforts that make life worth living, such as fishing and cooking.
Thiefly skills include old standbys such as lockpicking, backstabbing, and stealing, but also include things such as the setting of traps and snares, stalking, and acrobatics. These skills are not all available at this time.
The warrior has a wide range of skills to choose from, including various forms of hand to hand combat, such as wrestling, chokeholds, flips, and headbutts, plus chivalric things such as jousting and war cries, and of course berserking. These skills are not all available at this time.
Gunmen can learn several levels of shooting proficiency, making them far deadlier and more accurate with their weapon than the norm. They can learn to shoot two guns at once, to speeddraw with the best of the Old West, and to repair their guns when they've jammed.
Other weapons proficiencies exist for the archer, the swordsman, the fencer, and the armsman. See the fight system page for more information on this.
A martial arts system is under development in which we hope to replicate the actual abilities and moves of many real life martial arts, such as karate, kung fu, judo. and even the 'soft arts' like t'ai chi.