i don't know whether anyone is interested but i found quite good articles of kinds of sin. too many arabic terms though ...
http://www.central-mosque.com/fiqh/WhatIsSinInIslam.htm
What other kinds of sin are there, and how are they forgiven?
Kabirat is that which Shari’ah has strictly forbidden. And the punishment for that in this dunya is haad or ta’zirat or the punishment will come in Akheel. Kabirat pertains to that which is not forgiven, until a person makes tawba (repentance). Gumara sajira, or it’s called tharaba sajira, is forgiven through practicing of good deeds. If one commits tharaba sajira continuously, it becomes tharaba kabira. There are four kinds of tharuba (sins).
1.) That which will not be forgiven without tawba. Commission of this sin is like a kafir.
2.) That sin which has a possibility of being forgiven by tawba or by good deeds. These are tharaba sagina.
3.) Those sins for which tawba is necessary, but, if Allah wills, he can forgive without tawba. This is tharaba kabira, but it is tharab that transgress the rights of Allah.
4.) The tharab kabira that are connected to the rights of the society, other people. For forgiveness, it is necessary to make tawba and then restore the rights to that person and ask his forgiveness, and on conditions that he forgives you. This does not pertain exclusively to wealth. If one does not ask for forgiveness and is not forgiven, then on Yawmul-Qiyaama, the one whose rights have been transgressed will be given the good deeds of the transgressor as much as he pleases in accordance with justice. Or else the sins of the oppressed will be given to the transgressor according to justice. Allah may, of His own will, make the oppressed happy and show Mercy to the dhalameen (oppressor).
Hadith: Hazrat Abdullah bin Mas’ud narrates that a person asked Rasulullah (s.a.s.), “Ya Rasulullah, according to Allah, which is the greatest sin?” Rasulullah (s.a.s.) answered, “To associate partners with Allah (known as shirk), while He has created you.” Then he was asked, “Which is the biggest sin after that?” And he (s.a.s.) said, “To kill your offspring because he will eat with you.” Then he was asked “Which is the greatest after that,” and he said, “To make zinna (fornication) with your neighbor’s wife.”
As can be seen from the evidence provided, sin is a very major issue in the life of a Muslim. A Muslim strives to gain the pleasure of Allah and abstains from that which incurs the wrath of Allah. A Muslim begs Allah for His Guidance each and every time he or she performs Salaat (the ritual form of prayer a Muslim is commanded to perform five times a day), by reciting the last three ayats of Surah al-Fatiha (the opening Surah of the Holy Qur’an):
“(We beg of you to) Guide us in the Straight Path. The path of those whom You have favored. Not of those who have earned Your anger, and nor of those who have gone astray.”
Allah shows the Muslim the prayer for seeking His Guidance and avoiding His Wrath. The Mu’min is one who fully adheres to the Shari’ah and earns the Pleasure of Allah, thus steering away from sin at all costs. Al-Gawth Al-A’zam Shaykh Muhyyuddin ‘Abdul-Qadir al-Jilani (r.a.) has given many discourses on securing this path, and in Futuh Al-Ghaib (The Revelations of the Unseen), he states in the very first discourse:
Three things are indispensable for a believer in all conditions of life: he should keep the Commandments of Allah; he should abstain from the haraam (forbidden); and he should be pleased with the decree of Providence. Thus the least that is expected of a believer is that he should be without these three things. So it is meant that he should make up his mind for this and talk to himself about this and keep his organs engaged in this.
In conclusion, one sees that there exists a distinct difference between sin and mistakes. One should distinguish between the two and be aware of what his or her niyyat (intention) is before proceeding with an action. The Holy Last Messenger (s.a.s.) “Actions are but by intentions and every man will have but that which he intended.” It is best that one proceeds with the intention of pleasing Allah, and doing an action for Allah’s sake. Major sins are those sins in which a Muslim would never imagine of doing under any circumstances, but if committed, tawba would be performed immediately. One’s sins do not remove him or her from Islam unless he or she commits an act of kafir, unless their belief removes one from Islam. Allah says: “If I were to punish everyone for their sins, then NOTHING would remain in existence.” The worst sin anyone could ever commit is to ascribe partners with Allah, and this is known as shirk.
The evil which man does is either by his nafs (the unruly self which causes man to act irreligiously and cause his own harm) or Shaytaan. Allah is not happy with evil or bad deeds, and good deeds make Allah happy. And good is done by the help of Allah, but Allah only helps who desires good and puts forth effort. May Allah guide us all and forgive the sins of the past and the present and protect us from future sins. Aameen!