How sound is this hadeeth: “The ink of the scholar is more sacred than the blood of the martyr”?

Is it permissible to sell computer programs although I am afraid that they will use them for sinful purposes and that I may incur a burden of sin as a result of that, or am I not responsible for what the purchaser does after he has bought it from me?

I know that a woman is not permitted to travel without a mahram with her. I would like to know what is meant by (traveling) exactly. Where should we start measuring the distance, from the beginning (a place in the desert), or from where?
My father has a farm on Misr-Ismailia way, and he likes us to visit him every so often, this farm is about 75 minutes maximum from home. Is this considered traveling?
Considering that there are many new cities, schools, companies, and farms along the way.

In our country we have been affected by war and we were expelled from our land 23 years ago. Praise be to Allah, my father and I are settled now and we have a business. We borrowed money in order to settle and start a business, the value of which was 1 million. When we worked out the value of zakaah that we owe on the property and trade goods that we have in our possession, it was estimated to be 7 million, and the trade goods on which zakaah is due are worth 5 or 6 million. 
My questions are: 
1. Are we required to pay zakaah, as we have not paid it all these years because we were not able to pay off the debt of 1 million? Was it correct for us not to pay zakaah?
2. We do not have any cash now, if we are required to pay zakaah. We helped a brother of ours to pay off a debt he owed, so that he could pay off the borrowed amount without paying the interest that had been agreed upon. Is it possible for us to waive this debt and thus pay off the zakaah that we owe?
3. We own some property in the country where the war was, that we took possession of after the war ended, and we are planning to sell this property in order to pay off debts and so that we can buy a house in the place where we live now. Is this property subject to zakaah?.

I wasnt aware that ramadan fasts missed due to menstruation had to be made up before nafl ones and I started keeping some nafl ones so is it possible for me to change the intention of the previous nafl ones I have kept or to change the intention of fast during the day? Because the one I kept today for example I started off with the intention of keeping a nafl fast but can I now change this to the intention of making up the ones I missed in ramadan?

What is zuhd (asceticism)? Does it mean wearing scruffy clothing, fasting constantly, and keeping away from society, or something else?

I am a 24 years old girl. I fell in love, no dates, no meetings involved, pure love to a pure religious person. He promised to marry me and asked me to wait for him as his circumstances are difficult. I do not remember that he called me more than once. I asked him not to call me; because I feel this is wrong, although I love him. I felt that our love started going in the direction, he agreed to this feeling, and respected my opinion. He just sends me E-mails every so often via internet, so that I know his news. We have been in this love relationship for one year. I know this person and his family, and they know us well as well. I love him for Allah’s sake and sure he loves me as well. The problem is that I started receiving proposals, about 8 so far. Every time I refuse because I promised to wait for him. Now I am confused, is what I am doing halal or haram? I pray, Alhamdulillah, all obligatory and optional prayers, and pray qiyaam in the night as well; I fear I lose my good deeds because of what I am doing. Is a pure chaste love haram? Is my love to him halal or haram?.

For how long does Allah forgive a person's sin? If he repents and seeks forgiveness from his sin, then goes and commits the same sin again, then he seeks forgiveness again then commits the same sin again, and so on, does Allah forgive him or does that mean that he is not sincere towards Allah, especially if he repeats that sin after a short while, but he does not stop seeking forgiveness?

I am from a Muslim background, but I never used to offer the obligatory prayers and even when I tried to pray once, I did not do it right. In other words I did not prepare to do it in the proper manner. I ask Allah to forgive me. I heard that the one who does not pray is a disbeliever and is not a Muslim, but whoever offers the five daily prayers, or one or two of them and omits the rest, is regarded as a Muslim. Also, I did not pay zakah on my wealth, but for at least two years I have completed the fast of Ramadan, and I intend to continue doing so. I want to learn how to pray and make it part of my life, along with other acts of worship. 

Is it obligatory for me to pay zakah for all these many years (when I did not pay it), and to make up the days that I did not fast at the time when I was not praying? 

Please note that I have now reached the age of thirty-one years; perhaps you will understand that this may cause me a great deal of hardship; to ward off that hardship, can I start over? Will Allah forgive me if I do that?

When traveling via airplane which direction should one pray? Assuming that due to conditions on the plane the proper direction cannot be ascertained.

What should one who is informed about the correct direction of the qiblah during a prayer?

How can we teach our children the adhkaar (words of remembrance) to be recited every day and night?