winPenPack is a completely free project that presents you a huge collection of the most frequently used and most popular open source portable applications, so that they can be executed without installation from any USB Flash Drive or Hard Disk. winPenPack offer a wide range of portable applications like office tools, internet tools, multimedia tools, development tools, security applications and other frequently used utilities.
winPenPack can be downloaded in three different bundle, winPenPack Full, winPenPack Essential and winPenPack Personal. You can compare the difference of these three suite here, Comparison table of winPenPack.
If you are looking for portable apps as a suite, try winPenPack.