13 Applications to Install on Ubuntu running on Slow Computer

Recently i managed to install ubuntu on my laptop(IBM Thinkpad Cel 1.4Ghz 256 MB RAM) , which was a very fast machine when i purchased it three and half years back , however things in computers change very fast and now it was a slow moving machine for todays resource hungry applications . Now Ubuntu did work well on this machine however things weren't as zippy as they should be Open Office took a lot of time to load,Viewing PDF files with descent amount of Graphics and in descent quality took some time , and working on multiple applications simultaneously wasn't easy , and on using resource hungry applications like 3D games or playing encoded video files or encoding videos the system virtually stalls. So i decided enough is enough , i wasn't going to spend money buying new hardware but i decided to try some lightweight alternatives to the common applications and use them for my desktop work and here is the applications that i found useful and instructions on how i