This thread is for people looking for online learning resources, to supplement their course books. I will only be posting links of websites that let you browse through their entire content online either free or for a very nominal fee!! I will also attempt to rate these websites based on their content,tools used and services provided Please do not ask about "free e-books" here!! @ mods : didn't know where to put this thread so put it here, please shift to relevant section in case it doesn't belong here!! 1. I was looking for online calculus resources and I found this analyzemath.com. Rating(out of 5) **1/2 Category - Math I found it to be a decent website. It contains theory, which is explained with the help of java applets, sample problems and downloadable worksheets (in MS Excel format) among other things..It even has printable copies of graph papers (to learn how to draw graphs of functions) in different colors!!! And can you believe it, this is free of charge. It is maintainted by a mathematics lecturer from United Arab Emirates University (UGRU). 2. Another good website I encountered, is efunda.com Rating(out of 5) **** Category - Engineering(General) They have articles on most topics an engineer might want to discuss/read/update himself with. Some of them being, periodic table, design data (regarding design of springs, screw threads, plastic parts, etc), conversion tables, mathematics resources, et al. Some of the articles may be available only to members, after registering for a fee, which range from $10/month to $60/annum for individuals. This is not much, considering that most home tutors charge anywhere between Rs. 200 - 500/hr at least!! Will add more websites as and when I come across them.