http://www.onemanga.com/Lucky_Star/ it doesn't work on school computers, though.
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www.mangafox.com just type in Sailor Moon in the search bar and it will take you straight to it
On MangaReader.com
Manga Here provides both manga titles for free to read online. Shin Kotaro Makaritoru L is listed on the websites as not complete.
Reading free manga online can be done through websites such as MangaFox, OneManga, etc. Some scanlation teams tend to release work only on their websites. Check their requirements before downloading any title.
You can download it for free in this website: http://the-evil-empire.net .
You can read all the chapters of the manga in manga animea or manga fox.