OpenOffice.org is an office suite designed for word processing, spreadsheets, presentations, graphics and databases. It lets you create mathematical equations with a graphic user interface or by directly typing your formulas into the equation editor. You can also produce everything from simple diagrams to dynamic 3D illustrations... (
more)
The program works with the following extensions:
pdt,
odf,
sdd,
psw,
odg,
sds,
pwd,
odm,
sdw,
pwi,
odp,
sgl,
pwt,
ods,
stc,
xlt,
odt,
std,
sqf,
otg,
sti,
smd,
oth,
stw,
otp,
sxc,
sfs,
ots,
sxd,
scc,
ott,
sxi,
oxt,
sxm,
pot,
sxw,
vor,
pps,
xlw,
dot,
sda,
odb,
smf,
sdc and
fods
