Calibre is a great ebook management and conversion system, but it is meant to support ereaders, not BE one. The included ebook viewer is mediocre at best. There is an add-on for Firefox called EPUBReader that works much better, and with Calibre you can convert any othe formats to epub
Winrar is not free last I heard. Both 7zip and Izarc handle tar and gz. I prefer Izarc's interface, but it's all about personal taste
Winrar is not free last I heard. Both 7zip and Izarc handle tar and gz. I prefer Izarc's interface, but it's all about personal taste