I just purchased the Humble Indie Bundle, 5 games which run on Windows, Linux and Mac. They kindly offered md5 hashes, however they weren’t in a convenient format, so I created a md5sums file.
187287db6226ef6a306a4cd0cfa8dd45 *Aquaria111.2008.12.12.exe
8b24ddeeb553e028bbd501102f891cc2 *aquaria-lnx-humble-bundle.mojo.run
336d89eb431e0b00535a2b50146c579d *WorldOfGooSetup.1.30.exe
f5afa40893d0fbcc37885191404f6d8c *WorldOfGooSetup.1.41.tar.gz
b373132f6e78665f1076752b038a8218 *gish153-1.tar.gz
94e82d53e2104914f19ec97f7cf5da42 *gish1531.zip
41ea2e41fe42c40b5ad017ae1afb45c7 *lugaru-full-linux-x86-1.0c.bin
d40d4076ed3ffa2a9bc9913202c55a06 *lugaru-windows.zip
56060bb550e0cd7e90bc7bc60d7c4c23 *penumbra_overture_1.1.exe
539567b590cf53e65a8e8f1b2bc728b3 *penumbra_overture_1.1.sh
and for those that prefer sha1:
ec8fd66bb44c6f67eab40f73e57838dcb5e2f4dd *Aquaria111.2008.12.12.exe
48267967b3a57fb406fa6545261f8b758edb8fb5 *aquaria-lnx-humble-bundle.mojo.run
70fad514746d6fc482fc3d681a7e9d498374bdad *WorldOfGooSetup.1.30.exe
4f7202a4ac17dd1665a1ab7f90153e5b813e16f1 *WorldOfGooSetup.1.41.tar.gz
27b862939b6a01c29b1b146ed1307c0027217855 *gish153-1.tar.gz
7a1341822d4d4e0010cc1e8cce68da6bb02ea904 *gish1531.zip
2349bdea3d595c3aaedca0810229d12f96323874 *lugaru-full-linux-x86-1.0c.bin
73f09414e0cabd371802eea1b9c75c76522c5934 *lugaru-windows.zip
557c6988eda16c6269d09a35031fd1754e042c02 *penumbra_overture_1.1.exe
e115f7cfcf9710d7aa5b2a5a9186b3736bb55cf2 *penumbra_overture_1.1.sh
Note, these were correct and validated on the 8th of May, however, if any of the files have been updated the hashes might no longer much. Feel free to contact me to tell me if this happens.